
Aitheantas
Ascomycin 19-epimer
Gan liostú · C43H69NO12
01Aitheantas
| Lazychem ID | LC-06832 |
|---|---|
| CAS RN | Gan liostú |
| PubChem CID | 76971980 |
| Molecular formula | C43H69NO12 |
| Molecular weight | 792.01 g/mol |
| IUPAC name | (3S,4R,5S,8R,9E,12S,14S,15R,16S,18R,19S,26aS)-8-Ethyl-5,6,8,11,12,13,14,15,16,17,18,19,24,25,26,26a-hexadecahydro-5,19-dihydroxy-3-[(E)-2-[(1R ,3R ,4R )-4-hydroxy-3-methoxycyclohexyl]-1-methylvinyl]-14,16-dimethoxy-4,10,12,18-tetramethyl-15,19-epoxy-3H -pyrido[2,1-c][1,4]oxaazacyclotricosine-1,7,20,21-(4H ,23H )-tetrone |
| InChIKey | ZDQSOHOQTUFQEM-ROFNMVEVSA-N |
02Struchtúr agus steiréicheimic

The parsed structure contains 4 rings, includes aliphatic carbon, has 14 defined stereocentres. These statements are calculated from the published structure string.
| Defined stereocentres | 14 |
|---|---|
| Ring count | 4 |
| Secondary amines | 0 |
| Tertiary amines | 0 |
| 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 |
|---|---|
| InChI | Gan liostú |
03Stereochemistry
The published structure contains 14 defined and 0 unassigned tetrahedral stereocentres. The exact wedge and dash depiction is shown above.
Published same-connectivity configurations
4 recordsThese records have the same connectivity, molecular formula and protonation layer, but a different complete InChIKey stereochemical layer. Only separately structure-linked records are shown.

![Two-dimensional chemical structure of 17-ethyl-1,14-dihydroxy-12-[(E)-1-(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](/structures/pubchem/6916007-300.png)
17-ethyl-1,14-dihydroxy-12-[(E)-1-(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
CAS not listed
ZDQSOHOQTUFQEM-RJYATFDOSA-N
0 defined, 14 unassigned centres

Ascomycin / Tacrolimus EP Impurity A/ Tacrolimus Desmethylene Impurity
CAS 104987-12-4
ZDQSOHOQTUFQEM-NURRSENYSA-N
14 defined, 0 unassigned centres

Scope: The mathematical 2^n value is only an upper bound. Symmetry and other stereogenic elements can change the number of distinct stereoisomers. A hypothetical configuration is not published as a compound record without a verified structure identity.
04Stádas san India
Exact-compound status is evaluated only against the published name and CAS number. Confirm the current official instrument before a regulatory decision.
05Ainmneacha agus gaolta
API agus máthairdhruga
Tacrolimus
Eisíontais agus comhdhúile gaolmharaAinmneacha agus gaolta
- 19-Epi-Ascomycin
- Tacrolimus EP Impurity B
- (1S,9S,12S,13R,14S,17R,18E,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-dimethoxy13,19,21,27-tetramethyl-11,28-dioxa-4-azatricyclo[22.3.1.04,9]octacos-18-ene-2,3,10,16-tetrone
06Foinsí
- S01PubChem CID 76971980
Structure and machine-readable chemical identifiers.
