Download full text in PDF Opens in a new window. Article suggestions will be shown in a dialog on return to ScienceDirect. ... Please enable JavaScript to use all the features on this page. ... Reaction of anilines 1a-d with tetronic acid (2) or 1,3-cyclopentanedione (3) produced anilinolactones 4a-d and anilinocyclopentenone 5a, respectively, which were then condensed with benzaldehydes to yield 4-aza-1-arylnaphthalene lignan analogs 6–19. ... Cookies are used by this site. ...