Tacrolimus Dehydro Impurity

Chemical Name: 15,​19-​Epoxy-​3H-​pyrido[2,​1-​c]​[1,​4]​oxaazacyclotricosine​-​1,​7,​20,​21(4H,​23H)​-​tetrone, 8,​11,​12,​13,​14,​15,​16,​17,​18,​19,​24,​25,​26,​26a-​tetradecahydro-​19-​hydroxy-​3-​[2-​(4-​hydroxy-​3-​methoxycyclohexyl)​-​1-​methylethenyl]​-​14,​16-​dimethoxy-​4,​10,​12,​18-​tetramethyl-​8-​(2-​propenyl)​-​, [3S-​[3R*[E(1S*,​3S*,​4S*)​]​,​4S*,​5E,​8R*,​9E,​12R*,​14R*,​15S*,​16R*,​18S*,​26aR*]​]​- (9CI)

Smile: C/C([C@@H](OC([C@@H]1CCCCN1C(C([C@@](O2)(O)[C@@H](C[C@H](OC)[C@H]2[C@@H](OC)C3)C)=O)=O)=O)[C@H](C)/C=C/C([C@@H](CC=C)/C=C(C)/C[C@@H]3C)=O)=C\[C@H]4C[C@@H](OC)[C@H](O)CC4