p. 1901 - 1906
(1999)1-(4-methoxycarbonyl-2-nitrophenyl)pyrrolidin-2-one
1-(4-methoxycarbonyl-2-aminophenyl)pyrrolidin-2-one
1-{2-{[(Amino)(imino)methyl]amino}-4-carboxyphenyl}pyrrolidin-2-one
1-<4-methoxycarbonyl-2-(N,N'-bis(tert-butyloxycarbonyl)guanidino)phenyl>pyrrolidin-2-one