( ( ( Nitrogen-containing compounds ) ( such ( as ( ammonia ( , ( ( amines and ) proteins ) ) ) ) ) ) ( ( ( are usually ) ( present ( in ( municipal wastewater ) ) ) ) . ) )
(ROOT (S (NP (NP (JJ Nitrogen-containing) (NNS compounds)) (PP (JJ such) (IN as) (NP (NN ammonia) (, ,) (NNS amines) (CC and) (NNS proteins)))) (VP (VBP are) (ADVP (RB usually)) (ADJP (JJ present) (PP (IN in) (NP (JJ municipal) (NN wastewater))))) (. .)))
Nitrogen-containing compounds such as ammonia, amines and proteins are usually present in municipal wastewater.
(ROOT (S (NP (DT An) (NN amine)) (VP (VBZ is) (NP (NP (DT an) (JJ organic) (NN compound)) (SBAR (WHNP (WDT that)) (S (VP (MD can) (VP (VB be) (VP (VBN considered) (S (VP (TO to) (VP (VB be) (NP (NP (DT a) (NN derivative)) (PP (IN of) (NP (NN ammonia)))))))))))))) (. .)))
An amine is an organic compound that can be considered to be a derivative of ammonia.