| prov:value
| - om 2 to 16 carbon atoms, and particularly preferably having from 2 to 12 carbon atoms, such as acetoxy, ethylcarbonyloxy, benzoyloxy, pivaloyloxy, thenoyloxy and nicotinoyloxy), an acylamino group (preferably having from2 to 20 carbon atoms, more preferably having from 2 to 16 carbon atoms, and particularly preferably having from 2 to 10 carbon atoms, such as acetylamino, benzoylamino, thenoylamin
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