主权项 |
1. A compound having the following structure: wherein bond α is either present or absent, and when bond α is absent R1 is a monohalo substitution or a dihalo substitution, and when bond α is present R1 is H, a monohalo substitution or a dihalo substitution, wherein R2 is a C1-C10 alkyl, a C2-C10 alkenyl, a C2-C10 alkynyl, an aryl, a heterocyclic, or —C(O)(OH),or a stereoisomer of the compound thereof or a pharmaceutically acceptable salt of the compound. |