| http://www.w3.org/ns/prov#value | - In some embodiments of the compound of Formula II, X is NH, n is 1, R3 and R4 are independently selected from H, lower alkyl or substituted lower alkyl, and R6 is OH. In some such embodiments R5 is OH. In some such embodiments, one of R3 and R4 is a methyl group.
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