(1R,9S,12S,13R,14S,17R,21S,23S,24R,25S,27R)-17-ethyl-1,14-dihydroxy-12-{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

• ChemBase ID: 130532
• Molecular Formular: C43H69NO12
• Molecular Mass: 792.00746
• Monoisotopic Mass: 791.48197665
• SMILES: O=C1C(=O)N2CCCC[C@H]2C(=O)O[C@@H](/C(=C/[C@@H]2CC[C@@H](O)[C@H](OC)C2)/C)[C@H](C)[C@@H](O)CC(=O)[C@H](/C=C(\C[C@@H](C[C@@H](OC)[C@H]2O[C@]1(O)[C@H](C)C[C@@H]2OC)C)/C)CC
• Canonical SMILES: CC[C@H]1/C=C(/C)\C[C@H](C)C[C@@H](OC)[C@H]2O[C@](O)([C@@H](C[C@@H]2OC)C)C(=O)C(=O)N2[C@H](C(=O)O[C@H]([C@@H]([C@H](CC1=O)O)C)/C(=C/[C@@H]1CC[C@H]([C@@H](C1)OC)O)/C)CCCC2
• InChI: InChI=1S/C43H69NO12/c1-10-30-18-24(2)17-25(3)19-36(53-8)39-37(54-9)21-27(5)43(51,56-39)40(48)41(49)44-16-12-11-13-31(44)42(50)55-38(28(6)33(46)23-34(30)47)26(4)20-29-14-15-32(45)35(22-29)52-7/h18,20,25,27-33,35-39,45-46,51H,10-17,19,21-23H2,1-9H3/t25-,27+,28+,29-,30+,31-,32+,33-,35+,36-,37-,38+,39+,43+/m0/s1
• InChIKey: ZDQSOHOQTUFQEM-IXLPKJJWSA-N

NAMES AND DATABASE IDS

Names

• IUPAC name: (1R,9S,12S,13R,14S,17R,21S,23S,24R,25S,27R)-17-ethyl-1,14-dihydroxy-12-{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[22.3.1.0^4,^9]octacos-18-ene-2,3,10,16-tetrone; (1R,9S,12S,13R,14S,17R,18Z,21S,23S,24R,25S,27R)-17-ethyl-1,14-dihydroxy-12-[(1E)-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[22.3.1.0^4,^9]octacos-18-ene-2,3,10,16-tetrone
• IUPAC Traditional name: (1R,9S,12S,13R,14S,17R,21S,23S,24R,25S,27R)-17-ethyl-1,14-dihydroxy-12-{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[22.3.1.0^4,^9]octacos-18-ene-2,3,10,16-tetrone; ascomycin
• Synonyms: 17-ethyl-1,14-dihydroxy-12-[2-(4-hydroxy-3-methoxy-cyclohexyl)-1-methyl-vinyl]-23,25-dimethoxy-13,19,21,27-tetramethyl-11,28-dioxa-4-aza-tricyclo[22.3.1.04,9]octacos-18-ene-2,3,10,16-tetraone; Ascomycin; Ascomycin from Streptomyces hygroscopicus var. ascomyceticus

Database IDs

• CAS Number: 104987-12-4; 11011-38-4
• MDL Number: MFCD06198665
• PubChem SID: 24890817; 162224811
• PubChem CID: 5282071; 6437370
• CHEMBL: 8597
• Chemspider ID: 4445297
• Wikipedia Title: Ascomycin

CALCULATED PROPERTIES

• Acid pKa: 9.955601
• H Acceptors: 11
• H Donor: 3
• LogD (pH = 5.5): 5.453524
• LogD (pH = 7.4): 5.452334
• Log P: 5.4535394
• Molar Refractivity: 210.9752 cm^3
• Polarizability: 83.36068 Å^3
• Polar Surface Area: 178.36 Å^2
• Rotatable Bonds: 6
• Lipinski's Rule of Five: false

PROPERTIES

Safety Information

• RTECS: KD4185000
• European Hazard Symbols: Harmful (Xn)
• German water hazard class: 3
• Risk Statements: 20/21/22
• Safety Statements: 36/37
• GHS Pictograms: GHS07
• GHS Signal Word: Warning
• GHS Hazard statements: H302-H312-H332
• GHS Precautionary statements: P280
• Personal Protective Equipment: dust mask type N95 (US), Eyeshields, Gloves
• Storage Temperature: -20°C

DETAILS

Sigma Aldrich - A3835

Linkage
An FK506 analog with an ethyl rather than an allyl group at position 21.
Biochem/physiol Actions
Strong immunosuppressant; inhibits allogenic T-lymphocyte proliferation. It binds with high affinity to FKBP and inhibits calcineurin phosphatase in the nM range.