| http://www.w3.org/ns/prov#value | - Examples of useful catalysts include but are not limited to those selected from the group consisting of tin II and IV salts such as stannous octoate and dibutyltin dilaurate, respectively, tertiary amine compounds such as triethyl amine and bis(dimethylaminoethyl) ether, morpholine compounds such as ??,?????-dimorpholinodiethyl ether, bismuth carboxylates, zinc-bismuth carboxylates, iron (III) chl
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