Patent ID: 8835489

Claim:
A pterocarpanquinone compound of formula (I): where: R1 can be H; hydroxyl, C1 to C8 alkyl cyclic or aliphatic; C3 to C8 aryl cyclic or aliphatic; C3 to C8 alkenyl cyclic or aliphatic; C3 to C8 alkynyl cyclic or aliphatic; an ether group C2 to C8; formyl; alkali metal; alkaline earth metal; halogen; nitro; amino; amine; CO 2 R3, or an alcohol group C1 to C8; R2 can be H; hydroxyl, C1 to C8 alkyl cyclic or aliphatic; C3 to C8 aryl cyclic or aliphatic; C3 to C8 alkenyl cyclic or aliphatic; C3 to C8 alkynyl cyclic or aliphatic; an ether group C2 to C8; formyl; alkali metal; alkaline earth metal; halogen; nitro; amino; amine; or an alcohol group C1 to C8; and R3 can be H; C1 to C8 alkyl cyclic or aliphatic, C3 to C8 aryl cyclic or aliphatic, C3 to C8 alkenyl cyclic or aliphatic; C3 to C8 alkynyl cyclic or aliphatic; alkali metal; alkaline earth metal; or halogen; including a salt, solvate or racemate of formula (I).