Patent ID: 7649098

Claim:
A compound of the formula: wherein: R 1 is hydrogen, alkyl or aryl; R 3 is OR 3A , NHC(O)R 3A , NHSO 2 R 3A or hydrogen; each R 3A is independently hydrogen or alkyl, aryl, alkylaryl, arylalkyl, heteroalkyl, heterocycle, alkylheterocycle, or heterocyclealkyl optionally substituted with halo; R 6 is OR 6A or OC(O)R 6A ; R 7 is OR 7A or OC(O)R 7A ; R 8 is OR 8A or OC(O)R 8A ; R 9 is hydrogen, CH 2 OR 9A or CH 2 OC(O)R 9A ; and each of R 6A , R 7A , R 8A , and R 9A is independently hydrogen or lower alkyl.