主权项 |
1. A compound represented by Formula I: R1 is H, optionally substituted C1-6alkyl, C1-6haloalkyl, optionally substituted C3-8cycloalkyl, optionally substituted C6-10aryl, optionally substituted heterocycle, halogen, —OR10, —C2-6alkenyl, —C2-6alkynyl, —CN, —C(O)R11, amine, amide, urea, sulfonamide, sulfone, sulfoxide, sulfide, sulfonic acid, nitro, phosphate or phosphonic acid; R2 is H, optionally substituted C1-6alkyl, C1-6haloalkyl, optionally substituted C3-8 cycloalkyl, optionally substituted C6-10aryl, optionally substituted heterocycle, halogen, —OR10, —C2-6alkenyl, —C2-6 alkynyl, —CN, —C(O)R11, amine, amide, urea, sulfonamide, sulfone, sulfoxide, sulfide, sulfonic acid, nitro, phosphate or phosphonic acid; R3 is H, optionally substituted C1-6alkyl, C1-6haloalkyl, optionally substituted C3-8cycloalkyl, optionally substituted C6-10aryl, optionally substituted heterocycle, halogen, —OR10, —C2-6alkenyl, —C2-6alkynyl, —CN, —C(O)R11, amine, amide, urea, sulfonamide, sulfone, sulfoxide, sulfide, sulfonic acid, nitro, phosphate or phosphonic acid; R4 is H, optionally substituted C1-6alkyl, C1-6haloalkyl, optionally substituted C3-8cycloalkyl, optionally substituted C6-10aryl, optionally substituted heterocycle, halogen, —OR10, —C2-6 alkenyl, —C2-6 alkynyl, —CN, —C(O)R11, amine, amide, urea, sulfonamide, sulfone, sulfoxide, sulfide, sulfonic acid, nitro, phosphate or phosphonic acid; R5 is H, optionally substituted C1-6alkyl, C1-6haloalkyl, optionally substituted C3-8 cycloalkyl, optionally substituted C6-10aryl, optionally substituted heterocycle, halogen, —OR10, —C2-6alkenyl, —C2-6alkynyl, —CN, —C(O)R11, amine, amide, urea, sulfonamide, sulfone, sulfoxide, sulfide, sulfonic acid, nitro, phosphate or phosphonic acid; R6 is H or optionally substituted C1-6alkyl; R7 is H or optionally substituted C1-6alkyl; R8 is H or optionally substituted C1-6alkyl; R9 is H or optionally substituted C1-6alkyl; a is 0, 1, 2 or 3; R10 is —OH or optionally substituted C1-6alkyl; R11 is —OH, —OC1-6alkyl or optionally substituted C1-6alkyl; or a pharmaceutically acceptable salt thereof; provided that the compound is not of structure: |