| http://www.w3.org/ns/prov#value | - The groups represented by R4 and R5 are preferably each an alkyl group having from 1 to 16 carbon atoms, especially from 1 to 10 carbon atoms; an alkoxy group having from 1 to 10 carbon atoms, especially from 1 to 6 carbon atoms; a chlorine atom; a fluorine atom; an alkoxy carbonyl group, an alkylcarbonyl group or an N-substituted carbamoyl group each having from 2 to 16 carbon atoms, especially f
|
