Cholest-7-en-6-one,2,3,11,14,20,22,25- heptahydroxy-,(2â,3â,5â,11R,22R)-

Ningbo Zhengzhang Chemical Co.,Ltd is a comprehensive enterprises that integrates research and development, production and management into a whole. With years of development, it has been supplying hundreds of products covering Agrochemicals, Pharmaceutical Chemicals and Fine Chemicals. Most of the products have been exported to dozens of countries and regions. All of our clients are quite satisfied with our products because of the high quality and competitive price. What's more, we have establis... View more >>