benzyl N-[(4-hydroxyanilino)methylidene]carbamate

(S)-2-Benzyloxycarbonylamino-succinic acid 4-benzyl ester 1-[4-(benzyloxycarbonylamino-imino-methyl)-phenyl] ester

(R)-2-(5-Dimethylamino-naphthalene-1-sulfonylamino)-3-phenyl-propionic acid 4-(benzyloxycarbonylamino-imino-methyl)-phenyl ester

(S)-2-(5-Dimethylamino-naphthalene-1-sulfonylamino)-3-phenyl-propionic acid 4-(benzyloxycarbonylamino-imino-methyl)-phenyl ester

(S)-2,6-Bis-benzyloxycarbonylamino-hexanoic acid 4-(benzyloxycarbonylamino-imino-methyl)-phenyl ester