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

MedKoo CAT#: 121191

CAS#: 2421187-74-6

Description: VCN87746, also known as (S,R,S)-AHPC-PEG2-butyl alkyne, is a ProTAC building block. This conjugate contains a von Hippel-Lindau (VHL)-recruiting ligand, a linker with both hydrophobic and hydrophilic moieties, and a pendant alkyne for click chemistry with an azide on the target ligand. When used with other protein degrader building blocks with a pendant alkyne group, parallel synthesis can be used to more quickly generate ProTAC libraries that feature variation in crosslinker length, composition, and E3 ligase ligand. This product has no formal name at the moment. For the convenience of communication, a temporal code name was therefore proposed according to MedKoo Chemical Nomenclature (see web page:

Chemical Structure

CAS# 2421187-74-6

Theoretical Analysis

MedKoo Cat#: 121191
Name: VCN87746
CAS#: 2421187-74-6
Chemical Formula: C34H48N4O6S
Exact Mass: 640.33
Molecular Weight: 640.840
Elemental Analysis: C, 63.72; H, 7.55; N, 8.74; O, 14.98; S, 5.00

Price and Availability

Size Price Availability Quantity
50mg USD 830 2 Weeks
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Synonym: (S,R,S)-AHPC-PEG2-butyl alkyne

IUPAC/Chemical Name: (2S,4R)-1-((S)-3,3-Dimethyl-2-(2-(2-(oct-7-yn-1-yloxy)ethoxy)acetamido)butanoyl)-4-hydroxy-N-(4-(4-methylthiazol-5-yl)benzyl)pyrrolidine-2-carboxamide


InChi Code: InChI=1S/C34H48N4O6S/c1-6-7-8-9-10-11-16-43-17-18-44-22-29(40)37-31(34(3,4)5)33(42)38-21-27(39)19-28(38)32(41)35-20-25-12-14-26(15-13-25)30-24(2)36-23-45-30/h1,12-15,23,27-28,31,39H,7-11,16-22H2,2-5H3,(H,35,41)(H,37,40)/t27-,28+,31-/m1/s1


Appearance: To be determined

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

More Info:

Biological target:
In vitro activity:
In vivo activity:

Preparing Stock Solutions

The following data is based on the product molecular weight 640.84 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:
In vitro protocol:
In vivo protocol:

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