Development and validation of a stability indicative HPLC-PDA method for kaurenoic acid in spray dried extracts of Sphagneticola trilobata (L.) Pruski, Asteraceae

► We developed an HPLC method for kaurenoic acid assay in extract of Sphagneticola trilobata. ► The method proved to be stability indicative of kaurenoic acid. ► The method should be used for the future stability study of herbal preparation