prov:value
| - Examples of compounds having Formula XXI-A and XXI-B include those in which X is NR11, n is 3 or 4, Y is CO2R12, R12 is alkyl or aryl, and R1 and R3, together with the atoms to which they are bonded, form an aromatic ring, such as those compounds of Formulae XXI-A or XXI-B in which X is NH, R12 is a methyl group, and R1 and R3, together with the atoms to which they are bonded, form a phenyl ring.
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