( ( PRODUCT ( New substance ) ) ( ( produced ( as ( ( the result ) ( of ( a ( chemical reaction ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNP PRODUCT) (NNP New) (NN substance)) (VP (VBD produced) (PP (IN as) (NP (NP (DT the) (NN result)) (PP (IN of) (NP (DT a) (NN chemical) (NN reaction)))))) (. .)))
PRODUCT New substance produced as the result of a chemical reaction.
(ROOT (S (NP (NP (NNS Substances)) (VP (VBN produced) (PP (IN by) (NP (DT a) (NN reaction))))) (VP (VBP are) (VP (VBN known) (PP (IN as) (NP (NNS products))))) (. .)))