| prov:value
| - : R30, ???OPO3H, ???PO3H???R30, ???O, ???CO2R29, ???C(???O)???R29, ???C(???O)N(R29)2, ???CH2OR29, ???OR29, ???NR29)2, C1-C5 alkyl, and C2-C4 alkenyl; R29 is independently selected at each occurrence from the group: R30, H, C1-C6 alkyl, phenyl, benzyl, and trifluoromethyl; R30 is a bond to Ln; and a pharmaceutically acceptable salt thereof. 31.
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