List of Articles European pharmacopoeia Open Access Article Abstract Page Full-Text 1 - Comparison of Two Spectrophotometric Methods for Quantifying Total Hydroxycinnamic Acids in Coneflower (Echinacea purpurea) Preparations حسین مهدوی محمد رضا نادری محمدحسین اسماعیلی 10.14196/JHD. 2018. 235