Patent ID: 7026345
Filing Date: 2006-04-11
Classification: C07B,C07C

Abstract:
1. A compound of formula IIa or IIb wherein R is methyl, ethyl, n-propyl, isopropyl, n-butyl, or isobutyl and Q is N-acetyl-L-alanine, N-acetyl-L-arginine, N-acetyl-L-asparagine, N-acetyl-L-aspartic acid, N-acetyl-L-cysteine, N-acetyl-L-glutamine, N-acetyl-L-glutamic acid, N-acetyl-L-histidine, N-acetyl-L-isoleucine, N-acetyl-L-leucine, N-acetyl-L-lysine, N-acetyl-L-methionine, N-acetyl-L-phenylalamine, N-acetyl-L-proline, N-acetyl-L-serine, N-acetyl-L-threonine, N-acetyl-L-tryptophan, N-acetyl-L-tyrosine, N-acetyl-L-valine, N-acetyl-D-alanine, N-acetyl-D-arginine, N-acetyl-D-asparagine, N-acetyl-D-aspartic acid, N-acetyl-D-cysteine, N-acetyl-D-glutamine, N-acetyl-D-glutamic acid, N-acetyl-D-histidine, N-acetyl-D-isoleucine, N-acetyl-D-leucine, N-acetyl-D-lysine, N-acetyl-D-methionine, N-acetyl-D-phenylalamine, N-acetyl-D-proline, N-acetyl-D-serine, N-acetyl-D-threonine, N-acetyl-D-tryptophan, N-acetyl-D-tyrosine, or N-acetyl-D-valine.