2(3H)-FURANONE, DIHYDRO-3-BENZOYL-5-(2-PROPYNYLOXYMETHYL)- 28330-22-5 BRN 1256977 Propargyloxymethyl-4 benzoyl-2 gamma-butyrolactone gamma-Butyrolactone, 2-benzoyl-4-propargyloxymethyl