1. 托法替尼杂质(N-Des-(2-氰化物-乙酰基)-(3S,4R))

托法替尼杂质(N-Des-(2-氰化物-乙酰基)-(3S,4R))

Tofacitinib Impurity (N-Des-(2-Cyanide-acetyl)-(3S,4R))