| http://www.w3.org/ns/prov#value | - The preferable substituents are alkyl groups provided with a carbon number of 1-8 and most preferably of 1-4.An alkyl having a carbon number of 1-12 substituted benzoyloxy group, which is provided with preferably 1-3 and most preferably 1-2 alkyl groups, is a o-, m- or p-methylbenzoyloxy group, a 2,3-dimethylbenzoyloxy group, a 2,4-dimethylbenzoyloxy group, a 2,5-dimethylbenzoyloxy group, a 2,6-di
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