AMORPHOUS FORM OF CARBAMIC ACID, N,N'- (L,I-BIPHENYL -4,4'-DIYLBIS LH- IMIDAZOIE-5,2-DIYL- (2S)-2,L-PYRROLIDINEDIYL (1S)-L-(L-METHYIETHYL)-2-OXO-2,L-ETHANEDIYL LBIS-,C,C'- DIMETHYL ESTER OXALIC ACID (1:2) AND ITS PROCESS FOR PREPARATION THEREOF

摘要

The present invention is relates to the amorphous form of carbamic acid, N,N"- 1,1"- biphenyl -4,4"-diylbis 1H-imidazole-5,2-diyl- (2S)-2,1-pyrrolidinediyl (1S)-1-(1-methylethyl)- 2-oxo-2,1-ethanediyl bis-,C,C"-dimethyl ester, oxalic acid (1:2) of formula (Ib) and its process for preparation thereof.