Liquid Vardenafil HCL - Levitra

Vardenafil HCl is designated chemically as piperazine, 1-[[3-(1,4-dihydro-5-
methyl-4-oxo-7-propylimidazo [5,1-f] [1,2,4]triazin-2-yl) -4-ethoxyphenyl]sulfonyl]-4-ethyl-, monohydrochloride.
 

Related studies:

http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=pubmed&dopt=Abstract&list_uids=15963142&query_hl=5