Alkaloid and coumarins from the green fruits of Aegle marmelos

► Constituents of the green fruits of Aegle marmelos were investigated. ► An alkaloid and four coumarins along with 15 known compounds were isolated. ► The antifungal and antibacterial activities of selected compounds were evaluated. ► Xanthoarnol exhibited as good activity as that of vancomycin, with a MIC of 18.75 μg/ml.