Near-ultraviolet (300 to 400 nanometers) irradiation of saturated, oxygenated solutions of tryptophan in the absence of added sensitizer gives rise to substances that have various biological effects on isolated cells, including mutagenicity and selective lethality to recombination-deficient bacterial mutants. One of these biologically active products has been identified as H2O2, on the basis of spectrometric, chromatographic, chemical, and biological properties. Now H2O2 has been shown to account for the biological activities mentioned above.

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Aus dem Ketoester (I) erhält man mit Isopropylmagnesiumchlorid das Lacton (II) neben der freien Säure (III).

Die im Titel genannten Cadinun‐Sesquiterpene (XI) und (XIV) ‐ natürliche Baumwollmetaboliten ‐ werden wie im Formelschema gezeigt auf der Basis von 2‐Methylanisol (I) synthetisiert.