主权项 |
1. A compound comprising Formula (I) or a pharmaceutically acceptable salt thereof: wherein:
R1 and R2 are independently hydrogen, hydrocarbyl, or substituted hydrocarbyl, or R1 and R2 together form an optionally substituted, saturated or unsaturated, carbocyclic or heterocyclic ring or ring system;R3 is hydrogen, hydroxy, amine, cyano, halo, nitro, phospho, sulfo, thiol, hydrocarbyl, or substituted hydrocarbyl;R4, R5, R6, R7, R8, and R9 are independently hydrogen, hydroxy, amine, cyano, halo, nitro, phospho, sulfo, thiol, hydrocarbyl, or substituted hydrocarbyl; or any pair of R4 and R5, R6 and R7, or R8 and R9 together form ═O, ═S, ═CH2, or ═NRa, wherein Ra is hydrogen, hydrocarbyl, or substituted hydrocarbyl;Z1 and Z2 are independently oxygen, sulfur, nitrogen, or CH2; and is a single or double bond. |