Abstract
A novel aromatised 8(14)-secohopanoid 1 (C31H42) possessing a fluorene moiety, formed from derivatives of bacteriohopanepolyols by cyclisation, aromatisation, ring opening and side-chain cleavage reactions during sediment diagenesis, has been isolated from a 150 Ma old marine sedimentary rock and identified by 1H and 13C NMR spectroscopy and mass spectrometry.