6’,7‘-Dihydro-scutionin structure

Compound (95) showed a molecular formula of C60H82O8, also by HRFAB-MS and its 13C-NMR spectrum. The main difference with (94) was the absence of the C-6 -C-7 double bond, confirmed by 2D NMR spectroscopy. The absolute configuration was determined-as in the former case-by analysis of its CD spectrum. According to the data obtained, the structure of (95) was assigned as 6 ,7 -dihydro-scutionin aB, Fig. (51). 

HRFAB-MS and 13C-NMR spectrum. The most notable differences with compound (94), was the absence of the C-6 -C-7 double bond and an additional methoxy group, that was located at C-6 , according to a HMBC experiment. As in the case of the preceding compounds, the structure was confirmed by 2D NMR analysis and CD determined the absolute configuration. With those data, the authors determined the structure of (96) as 6 p-methoxy-dihydro-scutionin aB, Fig. (52). 

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