Two flavones, hypolaetin 8-O-β-glucuronopyranoside 3″-O-sulfate and isoscutellarein 8-O-β-glucuronopyranoside 3″-O-sulfate, together with hypolaetin 8-O-β-glucuronopyranoside, kaempferol 3-O-α-rhamnopyranosyl (1“→6′”)-β-glucopyranoside and quercetin 3-O-α-rhamnopyranosyl (1″→6″”)-β-glucopyranoside were isolated from the leaves of Abutilon indicum, and their structures elucidated by acid hydrolysis and spectroscopic methods, including HPLC/ESI-MS, and 1H, 13C NMR, COSY, HMQC, HSQC and HMBC spectroscopic experiments. The antimicrobial activity of hypolaetin 8-O-β-glucuronopyranoside 3″-O-sulfate and of isoscutellarein 8-O-β-glucuronopyranoside 3″-O-sulfate against Staphylococcus aureus was confirmed.
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