Alectinib free base

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MedKoo CAT#: 205799

CAS#: 1256580-46-7 (free base)

Description: Alectinib, also known as AF802, or CH5424802 or RO5424802, is a potent, selective, and orally available ALK inhibitor with a unique chemical scaffold, showing preferential antitumor activity against cancers with gene alterations of ALK, such as nonsmall cell lung cancer (NSCLC) cells expressing EML4-ALK fusion and anaplastic large-cell lymphoma (ALCL) cells expressing NPM-ALK fusion in vitro and in vivo. CH5424802 inhibited ALK L1196M, which corresponds to the gatekeeper mutation conferring common resistance to kinase inhibitors, and blocked EML4-ALK L1196M-driven cell growth. Alectinib was approved in Dec. 2015.

Chemical Structure

Alectinib free base
CAS# 1256580-46-7 (free base)

Theoretical Analysis

MedKoo Cat#: 205799
Name: Alectinib free base
CAS#: 1256580-46-7 (free base)
Chemical Formula: C30H34N4O2
Exact Mass: 482.26818
Molecular Weight: 482.62
Elemental Analysis: C, 74.66; H, 7.10; N, 11.61; O, 6.63

Price and Availability

Size Price Availability Quantity
10.0mg USD 150.0 Ready to ship
25.0mg USD 250.0 Ready to ship
50.0mg USD 450.0 Ready to ship
100.0mg USD 750.0 Ready to ship
200.0mg USD 1250.0 Ready to ship
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Related CAS #: 1256580-46-7 (free base)   1256589-74-8 (HCl)    

Synonym: AF 802; AF-802; AF802; CH5424802; CH5424802; CH 5424802; RO5424802; RO 5424802; RO5424802, Alectinib; brand name: Alecensa

IUPAC/Chemical Name: 9-ethyl-6,6-dimethyl-8-(4-morpholinopiperidin-1-yl)-11-oxo-6,11-dihydro-5H-benzo[b]carbazole-3-carbonitrile


InChi Code: InChI=1S/C30H34N4O2/c1-4-20-16-23-24(17-26(20)34-9-7-21(8-10-34)33-11-13-36-14-12-33)30(2,3)29-27(28(23)35)22-6-5-19(18-31)15-25(22)32-29/h5-6,15-17,21,32H,4,7-14H2,1-3H3


Appearance: White to off-white solidw powder

Purity: >98% (or refer to the Certificate of Analysis)

Shipping Condition: Shipped under ambient temperature as non-hazardous chemical. This product is stable enough for a few weeks during ordinary shipping and time spent in Customs.

Storage Condition: Dry, dark and at 0 - 4 C for short term (days to weeks) or -20 C for long term (months to years).

Solubility: Soluble in DMSO, not in water

Shelf Life: >2 years if stored properly

Drug Formulation: This drug may be formulated in DMSO

Stock Solution Storage: 0 - 4 C for short term (days to weeks), or -20 C for long term (months).

HS Tariff Code: 2934.99.9001

Biological target: Alectinib (CH5424802, AF-802, RG-7853) is a potent ALK inhibitor with IC50 of 1.9 nM in cell-free assays.
In vitro activity: The effects of alectinib on NCOA4-RET (rearranged during transfection) fusion-positive tumor cells were investigated in vitro. Alectinib inhibited the viability of NCOA4-RET-positive EHMES-10 cells, as well as CCDC6-RET-positive LC-2/ad and TPC-1 cells, in a dose-dependent manner. This was achieved via inhibition of the phosphorylation of RET and induction of apoptosis. Reference: Oncotarget. 2017 May 16;8(43):73766-73773.
In vivo activity: EHMES-10 cells developed pleural carcinomatosis accompanied by thoracic tumors and malignant pleural effusions within 28 days after intrathoracic (orthotopic) inoculation (Figure 4A). Alectinib treatment given from day 15 to day 28 remarkably inhibited the production of thoracic tumors and pleural effusions as determined by CT scans on day 28 (Figure 4A). Accordingly, the weight of thoracic tumors and the volume of pleural effusions in alectinib-treated mice were significantly lower than those of control mice (Figure 4B, 4C). To further assess whether alectinib rescued pleural carcinomatosis, an in vivo imaging model was utilized. For this model, luciferase-transfected EHMES-10 cells (EHMES-10/Eluc) were established. Elevated bioluminescence was detected in mice inoculated with EHMES-10/Eluc cells by day 24, indicating the presence of pleural carcinomatosis. Bioluminescence in control mice consistently increased over the course of the experiment, but bioluminescence in alectinib-treated mice decreased. These results clearly indicated that alectinib treatment rescued the pleural carcinomatosis produced by EHMES-10/Eluc cells (Figure 5A, 5B). Reference: Oncotarget. 2017 May 16;8(43):73766-73773.

Solubility Data

Solvent Max Conc. mg/mL Max Conc. mM
DMSO 3.0 6.22
DMF 3.0 6.22
DMF:PBS (pH 7.2) (1:2) 0.3 0.62

Preparing Stock Solutions

The following data is based on the product molecular weight 482.62 Batch specific molecular weights may vary from batch to batch due to the degree of hydration, which will affect the solvent volumes required to prepare stock solutions.

Recalculate based on batch purity %
Concentration / Solvent Volume / Mass 1 mg 5 mg 10 mg
1 mM 1.15 mL 5.76 mL 11.51 mL
5 mM 0.23 mL 1.15 mL 2.3 mL
10 mM 0.12 mL 0.58 mL 1.15 mL
50 mM 0.02 mL 0.12 mL 0.23 mL
Formulation protocol: 1. Arai S, Kita K, Tanimoto A, Takeuchi S, Fukuda K, Sato H, Yano S. In vitro and in vivo anti-tumor activity of alectinib in tumor cells with NCOA4-RET. Oncotarget. 2017 May 16;8(43):73766-73773. doi: 10.18632/oncotarget.17900. PMID: 29088743; PMCID: PMC5650298.
In vitro protocol: 1. Arai S, Kita K, Tanimoto A, Takeuchi S, Fukuda K, Sato H, Yano S. In vitro and in vivo anti-tumor activity of alectinib in tumor cells with NCOA4-RET. Oncotarget. 2017 May 16;8(43):73766-73773. doi: 10.18632/oncotarget.17900. PMID: 29088743; PMCID: PMC5650298.
In vivo protocol: 1. Arai S, Kita K, Tanimoto A, Takeuchi S, Fukuda K, Sato H, Yano S. In vitro and in vivo anti-tumor activity of alectinib in tumor cells with NCOA4-RET. Oncotarget. 2017 May 16;8(43):73766-73773. doi: 10.18632/oncotarget.17900. PMID: 29088743; PMCID: PMC5650298.

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1: Ou SH, Weitz M, Jalas JR, Kelly DF, Wong V, Azada MC, Quines O, Klempner SJ. Alectinib induced CNS radiation necrosis in an ALK+NSCLC patient with a remote (7 years) history of brain radiation. Lung Cancer. 2016 Jun;96:15-8. doi: 10.1016/j.lungcan.2016.03.008. Epub 2016 Mar 26. PubMed PMID: 27133743.

2: Tchekmedyian N, Ali SM, Miller VA, Haura EB. Acquired ALK L1152R Mutation Confers Resistance to Ceritinib and Predicts Response to Alectinib. J Thorac Oncol. 2016 Apr 15. pii: S1556-0864(16)30081-8. doi: 10.1016/j.jtho.2016.03.018. [Epub ahead of print] PubMed PMID: 27091190.

3: Aikawa H, Hayashi M, Ryu S, Yamashita M, Ohtsuka N, Nishidate M, Fujiwara Y, Hamada A. Visualizing spatial distribution of alectinib in murine brain using quantitative mass spectrometry imaging. Sci Rep. 2016 Mar 30;6:23749. doi: 10.1038/srep23749. PubMed PMID: 27026287; PubMed Central PMCID: PMC4812395.

4: Dong X, Fernandez-Salas E, Li E, Wang S. Elucidation of Resistance Mechanisms to Second-Generation ALK Inhibitors Alectinib and Ceritinib in Non-Small Cell Lung Cancer Cells. Neoplasia. 2016 Mar;18(3):162-71. doi: 10.1016/j.neo.2016.02.001. PubMed PMID: 26992917; PubMed Central PMCID: PMC4796802.

5: Tanaka H, Taima K, Morimoto T, Nakamura K, Tanaka Y, Itoga M, Takanashi S, Okumura K. Dramatic response to alectinib in a patient of ALK-rearranged lung cancer with poor performance status. BMC Res Notes. 2016 Mar 17;9(1):173. doi: 10.1186/s13104-016-1983-9. PubMed PMID: 26987388; PubMed Central PMCID: PMC4794901.

6: Yoshida T, Hida T, Yatabe Y. Rapid and dramatic response to alectinib in an ALK rearranged non-small-cell lung cancer patient who are critically ill. Anticancer Drugs. 2016 Mar 2. [Epub ahead of print] PubMed PMID: 26938871.

7: Yoshimura Y, Kurasawa M, Yorozu K, Puig O, Bordogna W, Harada N. Antitumor activity of alectinib, a selective ALK inhibitor, in an ALK-positive NSCLC cell line harboring G1269A mutation : Efficacy of alectinib against ALK G1269A mutated cells. Cancer Chemother Pharmacol. 2016 Mar;77(3):623-8. doi: 10.1007/s00280-016-2977-y. Epub 2016 Feb 5. PubMed PMID: 26849637.

8: Gainor JF, Chi AS, Logan J, Hu R, Oh KS, Brastianos PK, Shih HA, Shaw AT. Alectinib Dose Escalation Reinduces Central Nervous System Responses in Patients with Anaplastic Lymphoma Kinase-Positive Non-Small Cell Lung Cancer Relapsing on Standard Dose Alectinib. J Thorac Oncol. 2016 Feb;11(2):256-60. doi: 10.1016/j.jtho.2015.10.010. Epub 2015 Dec 18. PubMed PMID: 26845119; PubMed Central PMCID: PMC4743545.

9: Takegawa N, Hayashi H, Iizuka N, Takahama T, Ueda H, Tanaka K, Takeda M, Nakagawa K. Transformation of ALK rearrangement-positive adenocarcinoma to small-cell lung cancer in association with acquired resistance to alectinib. Ann Oncol. 2016 May;27(5):953-5. doi: 10.1093/annonc/mdw032. Epub 2016 Jan 24. PubMed PMID: 26811347.

10: Pirker R, Filipits M. Alectinib in RET-rearranged non-small cell lung cancer-Another progress in precision medicine? Transl Lung Cancer Res. 2015 Dec;4(6):797-800. doi: 10.3978/j.issn.2218-6751.2015.03.08. PubMed PMID: 26798590; PubMed Central PMCID: PMC4700226.

11: Fujita S, Masago K, Katakami N, Yatabe Y. Transformation to SCLC after Treatment with the ALK Inhibitor Alectinib. J Thorac Oncol. 2016 Jan 2. pii: S1556-0864(15)00275-0. doi: 10.1016/j.jtho.2015.12.105. [Epub ahead of print] PubMed PMID: 26751586.

12: Alectinib Approved for ALK+ Lung Cancer. Cancer Discov. 2016 Feb;6(2):115. doi: 10.1158/2159-8290.CD-NB2016-001. Epub 2016 Jan 6. PubMed PMID: 26739884.

13: Isozaki H, Ichihara E, Takigawa N, Ohashi K, Ochi N, Yasugi M, Ninomiya T, Yamane H, Hotta K, Sakai K, Matsumoto K, Hosokawa S, Bessho A, Sendo T, Tanimoto M, Kiura K. Non-Small Cell Lung Cancer Cells Acquire Resistance to the ALK Inhibitor Alectinib by Activating Alternative Receptor Tyrosine Kinases. Cancer Res. 2016 Mar 15;76(6):1506-16. doi: 10.1158/0008-5472.CAN-15-1010. Epub 2015 Dec 30. PubMed PMID: 26719536.

14: Shaw AT, Gandhi L, Gadgeel S, Riely GJ, Cetnar J, West H, Camidge DR, Socinski MA, Chiappori A, Mekhail T, Chao BH, Borghaei H, Gold KA, Zeaiter A, Bordogna W, Balas B, Puig O, Henschel V, Ou SH; study investigators. Alectinib in ALK-positive, crizotinib-resistant, non-small-cell lung cancer: a single-group, multicentre, phase 2 trial. Lancet Oncol. 2016 Feb;17(2):234-42. doi: 10.1016/S1470-2045(15)00488-X. Epub 2015 Dec 19. PubMed PMID: 26708155; PubMed Central PMCID: PMC4752892.

15: Jassem J. Alectinib in crizotinib-resistant, ALK-positive NSCLC. Lancet Oncol. 2016 Feb;17(2):134-5. doi: 10.1016/S1470-2045(15)00555-0. Epub 2015 Dec 19. PubMed PMID: 26708154.

16: Tani T, Yasuda H, Hamamoto J, Kuroda A, Arai D, Ishioka K, Ohgino K, Miyawaki M, Kawada I, Naoki K, Hayashi Y, Betsuyaku T, Soejima K. Activation of EGFR Bypass Signaling by TGFα Overexpression Induces Acquired Resistance to Alectinib in ALK-Translocated Lung Cancer Cells. Mol Cancer Ther. 2016 Jan;15(1):162-71. doi: 10.1158/1535-7163.MCT-15-0084. Epub 2015 Dec 18. PubMed PMID: 26682573.

17: Miyamoto S, Ikushima S, Ono R, Awano N, Kondo K, Furuhata Y, Fukumoto K, Kumasaka T. Transformation to small-cell lung cancer as a mechanism of acquired resistance to crizotinib and alectinib. Jpn J Clin Oncol. 2016 Feb;46(2):170-3. doi: 10.1093/jjco/hyv173. Epub 2015 Nov 27. PubMed PMID: 26613679.

18: Ou SH, Ahn JS, De Petris L, Govindan R, Yang JC, Hughes B, Lena H, Moro-Sibilot D, Bearz A, Ramirez SV, Mekhail T, Spira A, Bordogna W, Balas B, Morcos PN, Monnet A, Zeaiter A, Kim DW. Alectinib in Crizotinib-Refractory ALK-Rearranged Non-Small-Cell Lung Cancer: A Phase II Global Study. J Clin Oncol. 2016 Mar 1;34(7):661-8. doi: 10.1200/JCO.2015.63.9443. Epub 2015 Nov 23. PubMed PMID: 26598747.

19: Song Z, Wang M, Zhang A. Alectinib: a novel second generation anaplastic lymphoma kinase (ALK) inhibitor for overcoming clinically-acquired resistance. Acta Pharm Sin B. 2015 Jan;5(1):34-7. doi: 10.1016/j.apsb.2014.12.007. Epub 2015 Jan 24. Review. PubMed PMID: 26579422; PubMed Central PMCID: PMC4629211.

20: Takeuchi K, Togashi Y, Kamihara Y, Fukuyama T, Yoshioka H, Inoue A, Katsuki H, Kiura K, Nakagawa K, Seto T, Maemondo M, Hida T, Harada M, Ohe Y, Nogami N, Yamamoto N, Nishio M, Tamura T. Prospective and clinical validation of ALK immunohistochemistry: results from the phase I/II study of alectinib for ALK-positive lung cancer (AF-001JP study). Ann Oncol. 2016 Jan;27(1):185-92. doi: 10.1093/annonc/mdv501. Epub 2015 Oct 20. PubMed PMID: 26487585; PubMed Central PMCID: PMC4684157.

Additional Information

 Related CAS#
CAS#1256580-46-7 (Alectinib free base)
CAS#1256589-74-8 (Alectinib HCl)