Two substituted bibenzyls and a dihydrophenanthrene from Cymbidium Aloifolium

Two new substituted bibenzyls (1,2-diarylethanes) aloifol I and aloifol II and a new substituted 9,10-dihydrophenanthrene, 6-O-methylcoelonin in addition to batatasin III, coelonin and gigantol have been isolated and characterized. The three new compounds are 1-(4′-hydroxy-3′,5′-dimethoxyphenyl)-2-(3″-hydroxyphenyl)ethane, 1-(4′-hydroxy-3′,5′-dimethoxyphenyl)-2-(4″-hydroxy-3″-methoxyphenyl)ethane and 2,7-dihydroxy-4,6-dimethoxy-9,10-dihydrophenanthrene.