Patent ID: 6756366
Filing Date: 2004-06-29
Classification: A61P,C07J

Abstract:
A compound of the structural formula: whereinR1 is O, (H,H), (H,OR), NOR, with R being hydrogen, (C1-6)alkyl, or (C1-6)acyl; R2 is isopropyl, (C2-3)1-alkenyl, isopropenyl, 1,2-propadienyl, or (C2-3)1-alkynyl, each optionally substituted by halogen; or R2 is cyclopropyl, or cyclopropenyl, each optionally substituted by (C1-2)alkyl or halogen; R3 is hydrogen, (C1-2)alkyl, or ethenyl; R4 is (C1-2)alkyl; R5 is hydrogen, or (C1-15)acyl; and the dotted lines indicate optional bonds.