Additional substance description:
8-deoxylactucin, jacquinelin and its glycoside, crepidiaside B, 9alpha-hydroxyzaluzanin C, 9alpha-hydroxy-11beta, 13dihydrozaluzanin and its glycoside, ixerin F, lctuside A, verno-flexuoside (glucozaluzanin C) and its 11beta, 13-dihydro derivative