Identification of Descarbonsildenafil in an Adulterated Dietary Supplement and Evaluation of Its Inhibitory Activity for Phosphodiesterase Type 5 (PDE5)

• Yoko Ichikawa‐KajiUniversity of Tsukuba
• Jun’ichi NakajimaTokyo Metropolitan Institute of Public Health
• Shoko KikkawaToho University
• Fujio IshizawaUniversity of Tsukuba
• Rei NishiyamaTokyo Metropolitan Institute of Public Health
• Kiyoko KishimotoTokyo Metropolitan Institute of Public Health
• Nozomi UemuraTokyo Metropolitan Institute of Public Health
• Miki SatohTokyo Metropolitan Institute of Public Health
• Jin SuzukiTokyo Metropolitan Institute of Public Health
• Akiko InomataTokyo Metropolitan Institute of Public Health
• Dai NakaeTokyo University of Agriculture
• Isao AzumayaToho University
• Katsuya HondaUniversity of Tsukuba
• Takako MoriyasuTokyo Metropolitan Institute of Public Health