142438-63-9 3-Carbamoyl-3,4-epoxy-4-ethyl-5-hydroxy-5-methyl-gamma-butyrolactone 3-Carbamoyl-3,4-epoxy-4-ethyl-5-hydroxy-5-methyl-gamma-butyrolatone 6-Oxa-3-azabicyclo(3.1.0)hexane-1-carboxylic acid, 5-ethyl-4-hydroxy-4-methyl-2-oxo-, methyl ester CCRIS 4984