Patent ID: 6013244
Filing Date: 2000-01-11
Classification: A61P,C07J,Y10S

Abstract:
A compound of formula (I) ##STR16## and solvates thereof, in which R.sub.1 individually represents --OC(.dbd.O)C.sub.1-6 alkyl;R.sub.2 individually represents hydrogen, methyl which may be in the .alpha. or .beta. configuration or methylene;or R1 and R.sub.2 together represent ##STR17## wherein R.sub.5 and R.sub.6 are the same or different and each represents hydrogen or C.sub.1-6 alkyl;R.sub.3 and R.sub.4 are the same or different and each represents hydrogen or halogen; andrepresents a single or double bond.