prov:value
| - 0 aryl, or R5 and R6 together with the nitrogen to which they are attached form a nitrogen-containing ring; X is selected from ???O??? and ???S???; n is selected from 1, 2 and 3; and R7 is selected from ???H, ???F, ???C1-C4 alkyl, and ???CF3; and PG is a suitable protecting group; or any stereoisomer, mixture of stereoisomers, prodrug, metabolite, crystalline form, non-crystalline form, hydrate, s
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