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The structures of triterpenoid (oleanolic acid) and steroids identified in Calendula officinalis hairy roots. (1) oleanolic acid; (2) campesterol; (3) cholesterol; (4) isofucosterol; (5) 24-methylenecycloartanol; (6) sitosterol; (7) sitostanol; (8) stigmasterol; (9) stigmast-7-en-3-ol; (10) tremulone.
