Characterisation of phenolic acid derivatives and flavonoids from different morphological parts of Helichrysum obconicum by a RP-HPLC-DAD-(−)-ESI-MSn method

► Characterisation of phenolic compounds from Helichrysum obconicum by electrospray ionisation in the negative mode. ► Di- and tricaffeoylshikimic acid isomers reported for the first time in Helichrysum species. ► Characterisation of lamiridosins-di-O-hexoside, an unusual component in Asteraceae species.