Patent ID: 7790767

Claim:
A compound of general formula I wherein R is hydrogen and R 1 is hydroxy or acyloxy, or R is acyl and R 1 is hydroxy or acyloxy, X is sulphur, oxygen or NR 10 , wherein R 10 is hydrogen or (C 1-4 )alkyl; Y is sulphur or oxygen; R 2 is hydrogen or one or more substituents; R 4 is hydrogen or (C 1-4 )alkyl; R 5 is hydrogen or (C 1-4 )alkyl; R 3 and R 3 ′ are hydrogen, deuterium, or halogen; R 6 , R 7 and R 8 are hydrogen, halogen or deuterium; m is a number selected from 0 to 4, n is a number selected from 0 to 10, and p is a number selected from 0 to 10; with the proviso that n plus p are at least 1.