| http://www.w3.org/ns/prov#value | - d heterocyclic ring together with the N atom to which they are bonded, and R4 is hydrogen, C1 -C12 alkyl, phenyl, C2 -C13 alkoxymethyl or phenoxymethyl, X is a divalent group of the formula --O--, --N(R5)--, --NH--(CH2)2 --O--, --NH--(CH2)3 --O-- or --N(R5)--R7 --N(R.sup. 6)--, wherein R5 is hydrogen, C1 -C12 alkyl, C3 -C7 alkenyl, cyclohexyl, C3 -C12 alkoxyalkyl, C5 -C12 alkenoxyalkyl, C4 -C12 di
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