首页>
外国专利>
17- acetoxy -11- (4-N, N- dimethyl amino phenyl) production method of -19- norupureguna -4,9- diene -3,20- dione, production method of that intermediate field and that kind of intermediate field
17- acetoxy -11- (4-N, N- dimethyl amino phenyl) production method of -19- norupureguna -4,9- diene -3,20- dione, production method of that intermediate field and that kind of intermediate field