Maytansine Impurity D5

Chemical Name: N2'-Deacetyl-N2'-[3-[(1-ethyl-2,5-dioxo-3-pyrrolidinyl)thio]-1-oxopropyl]-maytansine-d5

Smile: COC1=C(Cl)C(N(C)C(C[C@@H]([C@](C)(O2)[C@H]2[C@H](C)[C@@H]3C[C@@]([C@@H](/C=C/C=C(C4)\C)OC)(O)NC(O3)=O)OC([C@H](C)N(C)C(CCSC5C(N(C([2H])([2H])C([2H])([2H])[2H])C(C5)=O)=O)=O)=O)=O)=CC4=C1