Patent ID: 7495026

Claim:
A compound of Formula I: wherein: R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 7 , R 8 , and R 9 are each independently selected from the group consisting of H, lower alkyl, hydroxy, lower alkoxy, halo, amino, aminoalkyl, nitro, heteroaryl, aryl, OC(═O)R 14 , OC(═O)OR 14 , OC(═O)N(R 14 ) 2 , O(CH 2 ) m N(R 14 ) 2 , C(═O)N(R 14 ) 2 , and O(CH 2 ) m COOH where m is 1-5 and R 14 is H or lower alkyl; or R 1 and R 2 together form a covalent bond; or R 2 and R 3 together form =Z, where Z is selected from the group consisting of O, S, and NH; X 1 is O; X 2 is C═O; X 3 is O; or a pharmaceutically acceptable salt thereof; subject to the proviso that neo-tanshinlactone is excluded therefrom.