( ( As ( part ( of ( this effort ) ) ) ) ( , ( ( Lorente ( de N&oacute; ) ) ( first ( ( ( ( synthesized ( ( a series ) ( of ( quaternary ( ammonium compounds ) ) ) ) ) , ) ( including ( ( ( tetramethylammonium ( -LRB- ( TEA -RRB- ) ) ) , ) ( which ( he ( substituted ( for ( ( ( monovalent cations ) ( -LRB- ( ( especially sodium ) -RRB- ) ) ) ( in ( ( his studies ) ( of ( ( the ( ionic basis ) ) ( of ( ( the ( nerve impulse ) ) ( -LRB- ( 1949 -RRB- ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) . ) ) ) ) )
(ROOT (S (PP (IN As) (NP (NP (NN part)) (PP (IN of) (NP (DT this) (NN effort))))) (, ,) (NP (NNP Lorente) (FW de) (NNP N&oacute;)) (ADVP (RB first)) (VP (VBD synthesized) (NP (NP (DT a) (NN series)) (PP (IN of) (NP (JJ quaternary) (NN ammonium) (NNS compounds)))) (, ,) (PP (VBG including) (NP (NP (NP (NN tetramethylammonium)) (PRN (-LRB- -LRB-) (NP (NNP TEA)) (-RRB- -RRB-))) (, ,) (SBAR (WHNP (WDT which)) (S (NP (PRP he)) (VP (VBN substituted) (PP (IN for) (NP (NP (NP (JJ monovalent) (NNS cations)) (PRN (-LRB- -LRB-) (NP (RB especially) (NN sodium)) (-RRB- -RRB-))) (PP (IN in) (NP (NP (PRP$ his) (NNS studies)) (PP (IN of) (NP (NP (DT the) (JJ ionic) (NN basis)) (PP (IN of) (NP (NP (DT the) (NN nerve) (NN impulse)) (PRN (-LRB- -LRB-) (NP (CD 1949)) (-RRB- -RRB-)))))))))))))))) (. .)))
As part of this effort, Lorente de N&oacute; first synthesized a series of quaternary ammonium compounds, including tetramethylammonium (TEA), which he substituted for monovalent cations (especially sodium) in his studies of the ionic basis of the nerve impulse (1949).
(ROOT (S (SBAR (WHADVP (WRB When)) (S (VP (VBG naming) (NP (DT an) (JJ ionic) (NN compound))))) (, ,) (NP (DT the) (NN cation)) (VP (VBZ is) (VP (VBN written) (ADVP (RB first)))) (. .)))
When naming an ionic compound, the cation is written first.