| http://www.w3.org/ns/prov#value | - subgenera of formula II being those of the formulas: ##STR3## where preferably R1 is methyl and A is --O--, ##STR4## where preferably R1 is methyl, A is --O--, and e is 2, and ##STR5## where preferably R1 is a hydrogen atom and A is --O--.
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