( ( ( ( ( Many ( commercial products ) ) , ) ( such ( as ( ( ( ( ( drugs , ) plastics ) , ) and ) ( elastomers ( -LRB- ( ( ( elastic substances ) ( similar ( to rubber ) ) ) -RRB- ) ) ) ) ) ) ) , ) ( ( have ( been ( developed ( by ( ( organic chemists ) ( who ( synthesize ( ( ( elements or ) ( simple compounds ) ) ( to ( create ( ( new ( ( compounds or ) substances ) ) ( that ( have ( different ( ( properties and ) applications ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (JJ Many) (JJ commercial) (NNS products)) (, ,) (PP (JJ such) (IN as) (NP (NP (NNS drugs)) (, ,) (NP (NNS plastics)) (, ,) (CC and) (NP (NP (NNS elastomers)) (PRN (-LRB- -LRB-) (S (NP (JJ elastic) (NNS substances)) (ADJP (JJ similar) (PP (TO to) (NP (NN rubber))))) (-RRB- -RRB-))))) (, ,)) (VP (VBP have) (VP (VBN been) (VP (VBN developed) (PP (IN by) (NP (NP (JJ organic) (NNS chemists)) (SBAR (WHNP (WP who)) (S (VP (VB synthesize) (S (NP (NP (NNS elements)) (CC or) (NP (JJ simple) (NNS compounds))) (VP (TO to) (VP (VB create) (NP (NP (JJ new) (NNS compounds) (CC or) (NNS substances)) (SBAR (WHNP (WDT that)) (S (VP (VBP have) (NP (JJ different) (NNS properties) (CC and) (NNS applications))))))))))))))))) (. .)))
Many commercial products, such as drugs, plastics, and elastomers (elastic substances similar to rubber), have been developed by organic chemists who synthesize elements or simple compounds to create new compounds or substances that have different properties and applications.
(ROOT (S (NP (NP (NNS Substances)) (SBAR (WHNP (WDT that)) (S (VP (MD can) (RB not) (VP (VB be) (VP (VBN broken) (PRT (RP down)) (PP (IN into) (NP (NP (JJR simpler) (NNS substances)) (PP (IN with) (NP (JJ different) (NNS properties))))))))))) (VP (VBP are) (VP (VBN called) (NP (NNS elements)))) (. .)))