| http://www.w3.org/ns/prov#value | - , ???CH2OR29, ???OR29, ???N(R29)2, C1-C5 alkyl, and C2-C4 alkenyl; [0479] R29 is independently selected at each occurrence from the group: R30, H, C1-C6 alkyl, phenyl, benzyl, and trifluoromethyl; [0480] R30 is a bond to Ln; [0481] and a pharmaceutically acceptable salt thereof. [0482] [40] In another preferred embodiment, the compound is of the formula:
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