Patent ID: 7189715

Claim:
An enantiomerically pure compound of Formula 3: or a pharmaceutically acceptable salt, solvate, hydrate or prodrug thereof, wherein: X is O or NR 3 ; R 1 and R 1′ are both H or when taken together are ═O; R 2 and R 2′ are both H or when taken together are ═O; and R 3 is H, alkyl, aryl, arylalkyl or —COR 4 , wherein R 4 is H, amine, alkyl, alkoxy, aryl, aryloxy, arylalkyl, or O-arylalkyl; provided that when X is NR 3 and R 1 , R 1′ , R 2 , and R 2′ are all H, then R 3 is not H or methyl.