(4Z)-4-[hydroxy(phenyl)methylidene]oxolane-2,3-dione

2,4-dimethyl-1,2,4,5-tetrazinan-3-one

N-甲基-3-叔丁氧羰氨基吡咯烷

2-羟基-5-(羟基甲基)苯甲醛

hydroxymethanesulfonate