4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylato, 3,3-dimethyl-7-oxo-6-[(phenylacetyl)amino]-, ion(1-), (2S,6R)- InChI=1/C16H18N2O4S/c1-16(2)12(15(21)22)18-13(20)11(14(18)23-16)17-10(19)8-9-6-4-3-5-7-9/h3-7,11-12,14H,8H2,1-2H3,(H,17,19)(H,21,22)/p-1/t11-,12+,14?/m1/s rel-(2R,6S)-3,3-dimethyl-7-oxo-6-[(phenylacetyl)amino]-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylate