Two new compounds from the leaves of Indocalamus latifolius

Two new compounds, erythro -syringylglycerol-9- O - trans -4-hydroxycinnamate 7- O - β -d-glucopyranoside ( 1 ) and indocalatin A ( 2 ), together with three known ones, 5,7,3′-trihydroxy-6-C- β -d-digitoxopyranosyl-4′- O - β -d-glucopyranosyl flavonoid ( 3 ), 5,4 ′ -dihydroxy-3 ′ ,5 ′ -dimethoxy-7- O -[ β -d-apiose-(1→2)]- β -d-glucopyranosyl flavonoid ( 4 ), and tricin-6-C- β -boivinopyranosyl-8-C- β -glucopyranoside ( 5 ), were isolated from the 95% EtOH extract of Indocalamus latifolius leaves.

Their molecular structures were determined by UV, IR, HRESIMS, CD, and 1D and 2D NMR data analyses.