1,4,4-trimethyl-2-aza-bicyclo[3.2.1]octan-3-one

3,3,5-trimethyl-pyrrolidin-2-one

4-甲磺酰基苯胺

trans-form of/the/ α.α-dimethyl-glutaconic acid

beta,beta-胡罗卜素-3,3',4,4'-四酮