Diphytanylglycerol diether

Present nomenclature of these core lipids and their variants or derivatives is cumbersome and trivial names appear to be required. Nishihara et al. [26] have suggested that diphytanylglycerol diether (structure 1, Fig. 1) and its variants (lA-lE, Fig. 1) be called archaeol (modified by adding the appropriate alkyl group designations, such as C20, C25, 3-hydroxy, etc.), and dibiphytanyldiglycerol tetraether (2) and its variant (2A) be called caldarchaeol and nonitolcaldarchaeol , respectively. This forms the basis of a useful and practical system of nomenclature for archaebacterial lipids, which will be followed here. 

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