| http://www.w3.org/ns/prov#value | - Where R304 and R305, R304 and R306, R305 and R306, R304 with R305 and R306, and R309 and R310 form rings, the rings preferably have 1 to 20 carbon atoms, more preferably 1 to 8 carbon atoms, and most preferably 1 to 6 carbon atoms, and may have branching alkyl groups of 1 to 6 carbon atoms, and especially 1 to 4 carbon atoms.
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