Abstract The occurrence of a series of new constituents which can be considered as Diels- Alder adducts of methyl vinyl ketone and ocimene ([RIGHTWARDS ARROW] 1–4), myrcene ([RIGHTWARDS ARROW] 9, 10) or β-far-nesene ([RIGHTWARDS ARROW] 11, 12), respectively, was reported. Furthermore, the structures of four isomeric cyclohexene derivatives could be established as adducts 21–24 of (E, Z)-and (E, E)-1, 3, 5- ...
