| http://www.w3.org/ns/prov#value | - l, or heteroaryl and r is an integer from 0 to 2), Z1Z2N(where Z1 and Z2 are, independently, H, alkyl, organofunctional alkyl, aryl, organofunctional aryl, or heteroaryl), Z3Z4Z5N+X??? (where Z3, Z4, and Z5 are, independently, alkyl, organofunctional alkyl, aryl, organofunctional aryl, or heteroaryl), Z6PO3 (where Z6 is H, Na, or any other mono- or di-valent cation including ammonium, alkyl, organ
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