prov:value
| - C12 alkenylene, or arylene; R6 is optionally substituted with a C1-C4 alkyl, C2-C4 alkenyl, C1-C4 alkoxy, ???OH, ???SH, halogen, ???NH2, or ???CO2R9; R6 is optionally interrupted by O or N; R7 is a bond or arylene; R7 is optionally substituted with ???OH, halogen, ???C(O)CH3,???NR10R11 or ???N+R10R11R12 (R13); R8 is H or C1-C4 alkyl; R9 is H, C1-C4 alkyl, or C2-C4 alkenyl; R10, R11, and R12 are in
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