Chemical Name: (3S,4R,5S,8R,9E,12S,14S,15R,16S,18R,19S,26aS)-5,19-Dihydroxy-3-[(1E)-1-[(1R,3R,4R)-4-hydroxy-3-methoxycyclohexyl]prop-1-en-2-yl]-14,16-dimethoxy-4,10,12,18-tetramethyl-8-(prop-2-en-1-yl)-3,4,5,6,8,11,12,13,14,15,16,17,18,19,24,25,26,26a- octadecahydro-7H-15,19-epoxypyrido[2,1-c][1,4]oxaazacyclotricosine-1,7,20,21(23H)-tetrone (as per EP); (3S,4R,5S,8R,9E,12S,14S,15R,16S,18R,19S,26aS)-8-Allyl-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 (as per USP)
Synonym: Tacrolimus 19-epimer (USP)
Smiles: CO[C@@H]1[C@]2([H])[C@@H](OC)C[C@@H](C)[C@](O)(O2)C(C(N3CCCC[C@@]3([H])C(O[C@H](/C(C)=C/[C@@H]4CC[C@@H](O)[C@H](OC)C4)[C@H](C)[C@@H](O)CC([C@H](CC=C)/C=C(C)/C[C@H](C)C1)=O)=O)=O)=O
Inchi: InChI=1S/C44H69NO12/c1-10-13-31-19-25(2)18-26(3)20-37(55-8)40(50)38(56-9)22-27(4)39(49)41(51)43(52)45-17-12-11-14-32(45)44(53)57-42(29(6)34(47)24-35(31)48)28(5)21-30-15-16-33(46)36(23-30)54-7/h10,19,21,26-27,29-34,36-38,40,42,46-47,50H,1,11-18,20,22-24H2,2-9H3/b25-19-,28-21+/t26-,27+,29+,30-,31?,32-,33+,34-,36+,37-,38-,40+,42?/m0/s1
Development and validation of a stability indicating HPLC assay method for tacrolimus in semi-solid dosage form & bulk drug
By Gejage, Santosh; Amin, Purnima
From Indo American Journal of Pharmaceutical Research (2018), 8(5), 1097-1106