prov:value
| - o-, di- or tri-substituted by C1 -C4 alkyl, allyl, undecenyl, oleyl or a group of the formula (III), R5 is a direct bond or C1 -C8 alkylene, R7 is hydrogen or methyl, R8 is --CN or a group --COOR9 with R9 being as defined above, R10 and R11 which can be identical or different are as defined above for R14 and R15, and R12 is C1 -C8 alkyl, phenyl or tolyl, and, if n is 2, A is C2 -C8 alkylene, 2-hyd
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