2,6-dioxa-4-azabicyclo[3.2.0]heptane-7-carboxylic acid, 4-acetyl-3,3-dimethyl-7-phenyl-, methyl ester InChI=1/C16H19NO5/c1-10(18)17-13-12(21-15(17,2)3)16(22-13,14(19)20-4)11-8-6-5-7-9-11/h5-9,12-13H,1-4H methyl 4-acetyl-3,3-dimethyl-7-phenyl-2,6-dioxa-4-azabicyclo[3.2.0]heptane-7-carboxylate