EP1497283A1 - MALEIC ACID SALT OF(2S)-N-(5(AMINO(IMINO)METHYL)-2-THIENYL)METHYL-1-(2R)-2-((2R)-2-((CARBOXYMETHYL)AMINO)3,3-DIPHENYLPROPANOYL)-2-PYRROLIDINE CARBOXAMIDE AND A PROCESS FOR