prov:value
| - carbon atoms, or the like), alkenyl group (for example, an alkenyl group having 1 to 20 carbon atoms), or substituted alkenyl group (for example, an alkenyl group at least one hydrogen of which has been substituted by halogen (fluorine, chlorine, bromine or the like), an alkoxy group having 1 to 3 carbon atoms, or the like), L is a divalent organic linking group, n is 0 or 1, and X is a carbonyl g
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