prov:value
| - Thus, examples of such catalysts include, for group (1), such compounds as aluminum, zinc, iron and cobalt acetylacetonates; for group (2), such compounds as dicyandiamide; for group (3), such compounds as 2-methylimidazole, 2-ethyl-4-methylimidazole and 1-cyanoethyl-2-propylimidazole; for group (4), such compounds as benzyldimethylamine, and 1,2-diaminocyclohexane; for group (5), such compounds a
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