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