Patent ID: 6541515
Filing Date: 2003-04-01
Classification: C07C

Abstract:
A compound of Formula (I): whereinone of R1 and R2 is â€”H, and the other of R1 and R2 is â€”OH; or R1 and R2 together form oxo; R3 is â€”OH, â€”OC(O)CH3 or â€”ORa; R4 is â€”CH2OH, â€”CH2OC(O)CH3, â€”CHO, or â€”CO2H; one of R5 and R6 is â€”H, and the other of R5 and R6 is â€”OH; or R5 and R6 together form oxo; R7 is â€”H, â€”Ra, â€”NH2, or â€”NRaRb; each Ra is independently â€”C1-C4 alkyl; and Rb is â€”H or â€”C1-C4 alkyl; or a pharmaceutically acceptable salt thereof.