Hangzhou VIWA Co., Ltd.
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   About us

VIWA pharma division is a professional supplier of active pharmaceutical ingredients and intermediates. We are specialized in R&D and custom manufacturing. Supported by our highly qualified team of professor and technicians, we have rich experience on a wide range of chemical reactions and fermentation from multi gram scale to hundred tons scale according to customers' requirement.

Our main products are cardiovascular, anti-diabetes, anti-cancer, steroid, anti-HIV and their intermediates, especially on oncology products.

Moreover, we are quite strong at regulatory issues. Our products have been marketed in USA, Europe, Latin America, India, Vietnam, Turkey, etc.
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Product List  

Risperidone

Application

Risperidone

Intermediates

6-Fluoro-3-(tetrahydropyridine-4-yl)benzo[b]isoxazol


Application

Risperidone

Intermediates

3-(2-Chloroethyl)-2-methyl-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidine-4-one


Application

Risperidone

CAS No.

84163-77-9

Intermediates

6-fluoro-3-(4-piperidinyl)-1,2-benzisoxazole


Application

Risperidone

CAS No.

41078-70-0

Intermediates

3-(2-chloroethyl)-6,7,8,9-tetrahydro-2-methyl-4H-pyrido[1,2-a]pyrimidin-4-one


 
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