久久久精品一区二区三区三州-欧美老熟妇毛茸茸性生活-欧美中文字幕在线精品-精品久久天干天天天按摩

Jiangxi Chibang Pharmaceutical Co., Ltd.

Mobile version

Pharmaceutical IntermediatesPhosphonium CompoundPyridine series

carbethoxy ethylidene triphenyl phosphorane

Product Name:carbethoxy ethylidene triphenyl phosphorane

CAS NO.: 5717-37-3

Standard≥98%