structure elucidation steroidal glycoside 8 Bauhinia candicans 6 Leguminosae 6 Caesalpinioideae 4 Compositae 4 Heliantheae 2 Nicotianeae 2 Nierembergia hippomanica 2 Senecio bonariensis 2 Solanaceae 2 Wedelia buphthalmiflora 2 Zexmenia buphthalmiflora 2 lethal principle 2 oleanolic acid 3-O-(3-O-α-l-rhamnopyranosyl)-β-d-glucuronopyranoside-28-O-β-d-glucopyranoside 2 oleanolic acid 3-O-(3′-O-α-l-rhamnopyranosyl)-β-d-glucuronopyranoside 2 pyrrole-3-carbamidine 2 saponins 2 sitosterol 3-O-α-D-riburonofuranoside 2 sitosterol 3-O-α-D-xyluronofuranoside 2 sitosterol 3-O-β-D-xylopyranoside 2 sitosterol 3-O-β-d-glucopyranoside 2 sitosterol 3-O-β-d-glucuronopyranoside 2 stigmasterol 3-O-β-d-glucopyranoside 2