... spectrophotometric method , was measured at 275nm wavelength absorbance, according to Bergenin (C14H16O9) of the absorption coefficient (E1% 1cm) 248, that ... is too. The dried product by product basis, with Bergenin (C14H16O9) should be 97.0% ~ 103.0%. Plant source ... (Ardisia crispa) roots, stems, leaves. A.hortorum. & Ltbr> [alias] Bergenin lactone, low tea factor, low tea-I, saxifrage prime, rock ...