The chemical name of doxepin is ( `` E '' / '' Z '' ) -3- ( dibenzo [ `` b '' , '' e '' ] oxepin-11 ( 6 '' H '' ) -ylidene ) - '' N '' , '' N '' -dimethylpropan-1-amine and its free base form has a chemical formula of C19H21NO with a molecular weight of 279.376 g/mol .
DET ADJ NOUN ADP NOUN AUX ( `` NOUN '' / '' NOUN '' ) -3- ( VERB [ `` X '' , '' NOUN '' ] X ( NUM '' NOUN '' ) X ) - '' PROPN '' , '' PROPN '' -dimethylpropan-1-amine CCONJ PRON ADJ NOUN NOUN VERB DET ADJ NOUN ADP NOUN ADP DET ADJ NOUN ADP NUM PROPN .