| 主权项 |
1. A compound that corresponds in structure to Formula I, below, or its pharmaceutically acceptable saltwherein
X is O, S, NR1, CH2, where R1 is H, or C1-C4 hydrocarbyl, or X is absent and two atoms link the depicted phenyl rings; Y is O, S, NR2, CH2, where R2 is H, or a C1-C4 hydrocarbyl group; R3 is a C1-C6 hydrocarbyl group; R4 and R5 are hydrido or hydroxyl but only one of R4 and R5 is hydrido, or both of R4 and R5 are hydroxyl; W is a ring structure that contains one or two rings and includes 5 to 12 atoms in the ring structure, said ring structure W optionally containing: a) 1, 2, 3 or 4 heteroatoms in the ring structure that are independently oxygen, nitrogen or sulfur, and b) one or more substituent groups bonded to one or more ring atoms, in which said one or more substituents contain a total of up to 8 atoms, selected from the group consisting of fluorine, chlorine, carbon, nitrogen, oxygen and sulfur, and mixtures thereof; and a dotted line (----) represents one or more optional double bonds. |
