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. ... The preparations of the tetrahydroisoquinolinol (2) and the -γ-carboxy-γ-formylglutamate (3) subunits, required for a proposed synthesis of naphthyridinomycin, are described. ... J. Chem. Soc., Perkin Trans Il (1983), p. 1705 and references therein.