Aromadendrane, Nardosinane, Neolemnane, Bicyclogermacrane

In addition to the two sinularane derivatives isolated from the marine source Clavularia inflata (see p. 114), the aromadendrane derivative (802) has also been identified in the related species Clavularia koellikeri.137 Another aromadendrane compound is the diol (803) obtained from the plant Senecio nemorensis.314 An X-ray analysis of nardosinone has confirmed its structure as (804).366 The soft coral Lemnalia africana is a rich source of sesquiterpenoids and recent investigations 383 e Trifilieff, Phytochemistry, 1980, 19, 2467. 

A full paper on the photochemical synthesis of (818), a compound related to taylorione (819), has been published.378 

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