prov:value
| - atom, (NR8)z, where R8 is defined the same as R5 and z is 1 to about 10, or R7 PO3 H2 (where R7 is a lower alkylene radical), where at least one of R1, R2, R3, R5, R6, R7, or R8 are a lower alkylene group, and lower alkyl and lower alkylene refers to alkyl and alkylene radicals having from one to ten carbon atoms.
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