Patent ID: 6197761
Filing Date: 2001-03-06
Classification: A61P,C07J

Abstract:
A compound of formula (I) ##STR17##and solvates thereof, in whichR.sub.1 represents O, S or NH;R.sub.2 individually represents OC(.dbd.O)C.sub.1-6 alkyl;R.sub.3 individually represents hydrogen, methyl, which may be in either the .alpha. or .beta. configuration or .dbd.CH.sub.2 ;or R.sub.2 and R.sub.3 together represent ##STR18##wherein R.sub.6 and R.sub.7 are the same or different and each represents hydrogen or C.sub.1-6 alkyl;R.sub.4 and R.sub.5 are the same or different and each represents hydrogen or halogen; and{character pullout} represents a single or a double bond.