| http://www.w3.org/ns/prov#value | - W1 is N or CRx30, where Rx30 is hydrogen, alkyl, or hydroxy, preferably Rx30 is hydrogen, methyl, hydroxy or trifluoromethyl; W2 is NR19, S or O; p is an integer from 2 to 12; each R19 is independently selected from the group consisting of:
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