Cialis Infor Chemical Name: Cialis Synonyms: IC 351;CIALIS;ICOS 351;TADALAFIL No: 171596-29-5 CBNumber: CB2236841 Molecular Formula: C22H19N3O4 Molecular Weight: 389.341 Purity: 99% Cialis Description: Tadalafil (Cialis), as a PDE5 inhibitor is used to treat erectile dysfunction (ED, impotence; inability to get or keep an erection), and the symptoms of benign prostatic hyperplasia (BPH; an enlarged prostate) which include difficulty urinating (hesitation, …