110104-61-5
ethyl (2,5-dihydro-4-methoxy-2-oxo-1H-pyrrol-1-yl)acetate
→
~94%
110853-09-3
ethyl (4-methoxy-2-oxopyrrolidin-1-yl)acetate
62613-81-4
4-羟基-2-氧代-1-吡咯烷乙酸乙酯