Patent ID: 7196208

Claim:
A compound of Formula I: wherein: a) R 1 is selected from H or COR 4 ; R 4 is C 1 –C 6 alkyl or C 1 –C 6 alkoxy; R 3 is C 1 –C 6 alkyl; Z 1 is wherein O—COR 4 is in the α configuration; Z 2 is —CH—; or Z 1 and Z 2 may be taken together to form a double bond; Q is b) R 1 is COR 4 ; R 4 is C 1 –C 6 alkyl or C 1 –C 6 alkoxy; R 3 is C 1 –C 6 alkyl; Z 1 is —CH 2 — or wherein O—COR 4 is in the α configuration; Z 2 is —CH—; or Z 1 and Z 2 may be taken together to form a double bond; and Q is