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The methanol extract of Saussurea medusa Maxim afforded two lignans: 2α-guaicyl-4-oxo-6α-catechyl-3,7-dioxabicyclo [3.3.0]octane and 1α-hydroxy-2α,4α-guaicyl-3,7-dioxabicyclo[3.3.0]octane; two chlorophyll derivatives: 13-epi-phaeophorbide-a and 13-epi-phaeophorbide-a methyl ester; one megastigmane derivative: 3β-hydroxy-5α,6α-epoxy-7-megastigmen-9-one, along with 19 known compounds. Their structures...
Three arylnaphthalene norlignans were isolated from the root of Vitex rotundifolia. Their structures were established from spectroscopic evidence as 1-(3,4-dimethoxyphenyl)-7-hydroxy-8- methoxynaphthalene-3-carbaldehyde, 1-(3,4-dimethoxyphenyl)-2,7-dihydroxy-8-methoxynaphthalene-3-carbaldehyde and 2,7-dihydroxy-1,9,10-trimethoxy-7H-benzo[c]fluorene-6-carbaldehyde, respectively.
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