Tetra
Chemical Name : Betamethasone 21-acetate
CAS : 987-24-6
Synonyms: 1,4-Pregnadien-9alpha-fluoro-16beta-methyl-11beta,17,21-triol-3,20-dione 21-acetate;9Alpha-fluoro-11beta,17,21-trihydroxy-16beta-methylpregna-1,4-diene-3,20-dione 21-acetate;9Alpha-fluoro-11beta,17alpha,21-trihydroxy-16beta-methyl-1,4-pregnadiene-3,20-dione 21-acetate;9Alpha-fluoro-16beta-methyl-11beta,17alpha,21-trihydroxy-1,4-pregnadiene-3,20-dione 21-acetate;Betamethasone 21-acetate;Betamethasone acetate
![4-Chloro-7-methyl-7h-pyrrolo[2,3-d]pyrimidine-5-carboxylic acid](http://thsciimg.chemcd.cn/TS44060.gif)
