prov:value
| - (i) R12 is an alkyl or substituted alkyl residue comprising 6 to 18 carbon atoms; or a cycloalkyl, a substituted cycloalkyl, a heterocyclic, a substituted heterocyclic, a heteroaryl, a substituted heteroaryl, an aryl or a substituted aryl residue comprising 5 to 18 carbon atoms, and (ii) R13, R14, R15 and R16 are independently or together hydrogen, a hydroxyl, or an amino residue, or an alkyl or s
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