A 121

Orders received during 11/25~11/29 will be shipped in 11/30/2020 due to Thanksgiving holiday.

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

MedKoo CAT#: 571019

CAS#: 68072-84-4

Description: A 121 is a non-polyene antifungal antibiotic, produced by an unidentified strain of Streptomyces. It is active against a number of filamentous fungi including some plant and human pathogens. The presence of an alpha-ketol system in the molecule is required for A 121 to exhibit antibiotic properties.

Price and Availability

Size Price Shipping out time Quantity
Inquire bulk and customized quantity

Pricing updated 2020-11-25. Prices are subject to change without notice.

A 121 is not in stock, may be available through custom synthesis. For cost-effective reason, minimum 1 gram order is requested. The product will be characterized by NMR, HPLC and MS analysis. Purity (HPLC) is usually >98%. CoA, QC data, MSDS will be provided when product is successfully made. The estimated lead time is 2-3 months. Please send email to sales@medkoo.com to inquire quote.

Chemical Structure


Theoretical Analysis

MedKoo Cat#: 571019
Name: A 121
CAS#: 68072-84-4
Chemical Formula: C18H30O5
Exact Mass: 326.2093
Molecular Weight: 326.43
Elemental Analysis: C, 66.23; H, 9.26; O, 24.51

Synonym: A 121

IUPAC/Chemical Name: 1-(2,3-dimethyl-2-(2-methylbut-3-en-2-yl)-2,3-dihydrofuran-3-yl)-3,5-dihydroxy-4-methoxyhexan-2-one


InChi Code: 1S/C18H30O5/c1-8-16(3,4)18(6)17(5,9-10-23-18)11-13(20)14(21)15(22-7)12(2)19/h8-10,12,14-15,19,21H,1,11H2,2-7H3


Technical Data

Solid powder

>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).

Soluble in DMSO

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:


1: Singh S, Samanta TB. A121--an antifungal compound from Streptomyces species. Microbios. 1992;71(288-289):217-24. PubMed PMID: 1479922.

2: Singh SK, Samanta TB. A121--a new antifungal antibiotic. Indian J Exp Biol. 1978 Jun;16(6):708-10. PubMed PMID: 700804.