C43H69NO12
792 g/mol
APIWarning
Ascomycin
CAS104987-12-4EC435-850-5
Category
API
Compound Class
Natural Product
Primary Use
Pharmaceutical Raw Material
Ascomycin, also known as Immunomycin or FR-900520, is an ethyl analog of tacrolimus with strong immunosuppressant properties. It is used as an active pharmaceutical ingredient in research and manufacturing for autoimmune diseases, skin diseases, and organ transplant rejection.
research compound for autoimmune diseasesresearch compound for skin diseasesresearch compound for organ transplant rejection prevention
Content scope: Information here supports chemical identification and industrial supply, research, and manufacturing contexts. It is not a therapeutic claim, medical advice, or drug-use instructions.
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Related Compounds
StrongStructure SimilarSimilarity 0.90
Pimecrolimus
CAS137071-32-0
active pharmaceutical ingredient
StrongStructure SimilarSimilarity 0.88
Tacrolimus hydrate
CAS109581-93-3
pharmaceutical raw material
StrongStructure SimilarSimilarity 0.88
8-Epitacrolimus
CAS129212-35-7
pharmaceutical raw material
StrongStructure SimilarSimilarity 0.88
Tacrolimus
CAS104987-11-3
pharmaceutical raw material
ReferenceSame Category
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CAS1050477-27-4
pharmaceutical raw material
ReferenceSame Category
Finerenone
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pharmaceutical raw material
ReferenceSame Category
Dolutegravir
CAS1051375-16-6
pharmaceutical raw material
ReferenceSame Category
Dolutegravir sodium
CAS1051375-19-9
pharmaceutical raw material
Safety Reference
Warning
H302Harmful if swallowed
H312Harmful in contact with skin
H332Harmful if inhaled
H351Suspected of causing cancer
H361Suspected of damaging fertility or the unborn child
H413May cause long lasting harmful effects to aquatic life
H373May cause damage to organs through prolonged or repeated exposure
Customs Tariff Classification
The international HS code for Ascomycin (CAS 104987-12-4) is 2934.99.
HS code (international, 6-digit)
2934.99
EU CN code (8-digit)
2934 99 90
Classification per the EU customs inventory ECICS (2026-07 snapshot, HS 2022). National tariff lines and product form can affect the final classification.
Identifiers
IUPAC Name
(1R,9S,12S,13R,14S,17R,18E,21S,23S,24R,25S,27R)-17-ethyl-1,14-dihydroxy-12-[(E)-1-[(1R,3R,4R)-4-hydroxy-3-methoxycyclohexyl]prop-1-en-2-yl]-23,25-dimethoxy-13,19,21,27-tetramethyl-11,28-dioxa-4-azatricyclo[22.3.1.04,9]octacos-18-ene-2,3,10,16-tetrone
InChIKey
ZDQSOHOQTUFQEM-NURRSENYSA-N
SMILES
CC[C@@H]1/C=C(/C[C@@H](C[C@@H]([C@@H]2[C@H](C[C@H]([C@@](O2)(C(=O)C(=O)N3CCCC[C@H]3C(=O)O[C@@H]([C@@H]([C@H](CC1=O)O)C)/C(=C/[C@@H]4CC[C@H]([C@@H](C4)OC)O)/C)O)C)OC)OC)C)\C
Synonyms (28)
- Ascomycin; Tacrolimus EP Impurity A
- Ascomycin (FK520)
- Changchuanmycin
- Immunomycin
- L 683,590
- ascomycin
Sourcing Ascomycin?
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