WARNING: This product is for research use only, not for human or veterinary use.

MedKoo CAT#: 555983

CAS#: 206133-42-8

Description: FBN33428, also known as Fmoc-​Phe-​Lys(Boc)​-​PAB; is a Hydrolyzable linker for making ADC conjugate. FBN33428 is useful for making hydrolyzable prodrugs for delivery of anticancer drugs to metastatic cells. FBN33428 was first reported in WO 9813059. This product has not formal name. For the convenience of scientific communication, we named it by combining its Inchi key (3 letters from the first letter of each section) with the last 5 digits of its CAS number or its molecule weight if its CAS number is not available (see MedKoo Chemical Nomenclature, https://www.medkoo.com/page/naming).

Chemical Structure

CAS# 206133-42-8

Theoretical Analysis

MedKoo Cat#: 555983
Name: FBN33428
CAS#: 206133-42-8
Chemical Formula: C42H48N4O7
Exact Mass: 720.3523
Molecular Weight: 720.867
Elemental Analysis: C, 69.98; H, 6.71; N, 7.77; O, 15.54

Price and Availability

Size Price Availability Quantity
100.0mg USD 950.0 2 Weeks
200.0mg USD 1450.0 2 Weeks
500.0mg USD 2450.0 2 Weeks
1.0g USD 3450.0 2 Weeks
2.0g USD 5850.0 2 Weeks
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Synonym: Fmoc-​Phe-​Lys(Boc)​-​PAB; FBN33428; FBN-33428; FBN 33428;

IUPAC/Chemical Name: tert-butyl ((S)-5-((S)-2-((((9H-fluoren-9-yl)methoxy)carbonyl)amino)-3-phenylpropanamido)-6-((4-(hydroxymethyl)phenyl)amino)-6-oxohexyl)carbamate


InChi Code: InChI=1S/C42H48N4O7/c1-42(2,3)53-40(50)43-24-12-11-19-36(38(48)44-30-22-20-29(26-47)21-23-30)45-39(49)37(25-28-13-5-4-6-14-28)46-41(51)52-27-35-33-17-9-7-15-31(33)32-16-8-10-18-34(32)35/h4-10,13-18,20-23,35-37,47H,11-12,19,24-27H2,1-3H3,(H,43,50)(H,44,48)(H,45,49)(H,46,51)/t36-,37-/m0/s1


Appearance: Solid 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: To be determined

Shelf Life: >2 years if stored properly

Drug Formulation: To be determined

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

Preparing Stock Solutions

The following data is based on the product molecular weight 720.867 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

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100.0mg / USD 950.0