... is smelless and bitter with the purity of above 99.95%.The product should be kept in dark and dry place ... derivatives of sildenafil. And its changeable forms LG-MS, HPLC have been tested by advanced facility and have passed international intellectual property protection ... . 100% pass to UK, Norway, Poland, Spain, USA, Canada, Brazil; 98% pass to Germany, Russia, Australia, New Zealand. 4. Most of ...