The invention relates to a compound of Formula (I), or a pharmaceutically acceptable salt thereof: wherein R1 is C1-8 alkyl, C1-8 alkoxy, CN, NO
2
, amino, COOH, COOCH
3
, OH, N
3
, or halogen and R2 is H, OH, C1-8 alkyl, C1-8 alkoxy, C2-C6 alkenyl, halogen, Bn-O—, Bn- optionally substituted, or Ph- optionally substituted.
本发明涉及化合物I式或其药学上可接受的盐:其中R1为C1-8烷基,C1-8烷氧基,CN,
NO2,
氨基,COOH,COOCH3,OH,N3或卤素,R2为H,OH,C1-8烷基,C1-8烷氧基,C2-C6烯基,卤素,Bn-O—,Bn-选择性取代,或Ph-选择性取代。