1 i Bull. Soc. Chim. Belg., 59, pp. 208-222. 1'350 ... Synth&ses dam le domaine des hydrocarbures canchrigknes ( ') ... Su\imiil - 6-7-9-10-tetranirthyI-l-2-benlauthracene niid 1'-4'-cIiiiic- thyl-3-4-(2'-3'-naphto)-pyrene have been prepared. Attempts to synthesise 11-12-dimethylantlianthrrne aiid 9-lO-tliinr~- thyl-1-2-3-~-5-G-triheriza11thracene have SO far failed. Coildensation products from P-(1-naphthoyl), P-(2-naphthoyl) niid p-(2-tetrahydronaphthoyl)-acrylic acids with ...