OMICS International OMICS International is a scientific organization that drives the progress of research through open access journals and organizes international conferences, The best in science news, commentary, and research. Medicinal Chemistry Volume 8, Issue 5 Sildenafil ViagrasupTMsup Synthesis Step by Step and its Pharmaceutical Importance in Diabetic Patients with Erectile Dysfunction Mohammed Abdalla Hussein , Yasser Omar Mosaad and Naglaa Abd El Khalik Gobba Taste Receptor Tas2r5 and Tas1r3 is Expressed in Sublingual Gland Feng Li , Bowen Niu and Mengmin Zhu Stem Cell in Lingual Epithelia and Papillae Feng Li