p-nitro-o-carboxyphenylthio ether

2-羟基-3-甲基-1,4-萘醌

(2-lactoyl-phenyl)-glyoxylic acid

[2-(2-chloro-propionyl)-phenyl]-glyoxylic acid

2,2-dimethyl-1,3-dioxaspiro[4,5]-decane