SEARCH Articles Figures Tables A-Methylene butyrolactone A-Methylene-y-butyrolactones A-methylene-y-butyrolactone Alpha-methylene-gamma-butyrolactone Butyrolactone Butyrolactones Methylene butyrolactones, carboxylates Methylene-butyrolactones Methylene-butyrolactones Methylene-y-butyrolactones O-Methylene-y-butyrolactones