Patent ID: 8835462

Claim:
A compound of Formula I: X is H or C(O)R 6 ; Y is H, C(O)R 6 , or Q; Q is R 1 is O; R 2 is H, alkyl, alkenyl, aryl, heterocyclyl, silyl, each substituted with 0, 1 or multiple R 5 , —C(O)R 5 ; R 3 is phenyl or cyclohexyl; R 4 is alkyl or alkoxy, substituted with 0, 1, or multiple R 5 ; R 5 is hydroxy, alkyl, alkenyl, halo, haloalkyl, alkoxy, haloalkoxy, C(O)R 8 , arylalkoxy, or aryl, where each R 5 is substituted with 0, 1, or multiple R 9 ; R 6 is alkoxy, benzyloxy, substituted with 0, 1, or multiple R 9 ; R 7 is H, —C(O)R 4 , or —CH 2 OC(O)R 4 ; R 8 is hydroxy, alkyl, alkoxy, N(R 9 ) 2 , arylalkoxy; and R 9 is H or alkyl.