| prov:value
| - In Reaction 1, R1, R2, R3 and R10 are independently selected from H, linear or branched, substituted or unsubstituted alkyl, with R1 and R2 preferably H and R3 preferably CH3, R4 is an optional bridging group that may be alkyl, substituted or unsubstituted alkyl, or aryl, preferably alkyl, G is a guanidinyl group, P is a protecting group selected from, for example, Boc urethane (Boc=C(O)OtBu), or
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