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(2007/10/02)ethyl (N-tert-butyloxycarbonyl)-4-(sulfomethyl)-D-phenylalaninate
ethyl (N-tert-butyloxycarbonyl)-4-(sulfomethyl)-D,L-phenylalaninate
N-tert-butyloxycarbonyl-4-(sulfomethyl)-D-phenylalanine
N-tert-butyloxycarbonyl-4-(sulfomethyl)-L-phenylalanine
ethyl 4-(sulfomethyl)-D,L-phenylalaninate