prov:value
| - In the above-mentioned formula (iv), R7 is a hydrocarbon group of 1-12 carbon atoms, for example, alkyl, cycloalkyl or aryl, and more particularly include methyl, ethyl, n-propyl, isopropyl, isobutyl, pentyl, hexyl, octyl, cyclopentyl, cyclohexyl, phenyl and tolyl.
|