prov:value
| - In some embodiments of compounds of formula IA, IB, and IC, R4, R5, and R6 are selected from H or a halogen such as Cl or F. In other embodiments of compounds of formula IA, IB, and IC, at least one of R4, R5, or R6 is a F whereas in other embodiments of compounds of formula IA, IB, and IC, R4, R5, and R6 are all H.
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