1. 硼替佐米杂质2(1S,2R)-异构体和(1R,2R)-异构体的混合物

硼替佐米杂质2(1S,2R)-异构体和(1R,2R)-异构体的混合物

Bortezomib Impurity 2 (Mixture of (1S,2R)-Isomer and (1R,2R)-Isomer)