( ( ( ( ( nitrogen atom ) , ) ( chiral ( carbon atom ) ) ) , ) ( ( carbonyl ( carbon atom ) ) . ) )
(ROOT (S (NP (NP (NN nitrogen) (NN atom)) (, ,) (NP (JJ chiral) (NN carbon) (NN atom)) (, ,)) (VP (VBP carbonyl) (NP (NN carbon) (NN atom))) (. .)))
nitrogen atom, chiral carbon atom, carbonyl carbon atom.
(ROOT (S (NP (NNS Amines)) (VP (VBP are) (VP (VBN classified) (PP (VBG according) (PP (TO to) (NP (NP (DT the) (NN number)) (PP (IN of) (NP (NP (NN carbon) (NNS atoms)) (VP (VBG bonded) (ADVP (RB directly)) (PP (TO to) (NP (DT a) (PRN (-LRB- -LRB-) (NP (NN n)) (-RRB- -RRB-)) (JJ nitrogen) (NN atom))))))))))) (. .)))