Patent ID: 6590106
Filing Date: 2003-07-08
Classification: C07C,C40B,Y02P

Abstract:
A compound represented by the following structural formula: or salts thereof, wherein:R1 is an amino acid side-chain or a protected amino acid side-chain; R2 is â€”NR5R6 or â€”N+â‰¡Câˆ’; or R1 and R2, taken together with the methine group to which they are bonded, are a moiety represented by the following structural formula: R3 is â€”NH2, â€”OH, â€”OC(O)H or â€”OR; R4 is â€”NH2 or â€”NO2; R5, R6 and R7 are each, independently, â€”H or an amine protecting group; R8 is â€”H, â€”OH or â€”OR9; and R9 is an alcohol protecting group.