Patent ID: 6831099
Filing Date: 2004-12-14
Classification: C07K

Abstract:
A compound having a structure that conforms to structure I: X is a heteroatom; R1, R2, R3, and R4 are, independently, hydrogen or a branched or unbranched: C1-6 alkyl group, C1-4 hydroxy alkyl group, C1-6 alkoxy, or aryl or aryl-substituted C1-6 alkyl group, any of which can be substituted with amide linkages, amines, carboxylic acids and salts thereof, carboxyl esters, thiols, or thioethers; and R5 is a chain of amino acids, hydrogen, an acetyl group, or a protecting group, with the proviso that, simultaneously, R1 is not iso-butyl, R2 is not 1-hydroxy ethyl, R3 is not sec-butyl, R4 is not sec-butyl, and R5 is not an acetyl group.