• 1-[4-ethoxy-3-(6,7-dihydro-1-methyl-7-oxo-3-propyl-1H-pyrazolo[4,3-d]pyrimidin-5-yl)
• phenylsulfonyl]-4-methylpiperazine
• SILDENAFIL;1-[[3-(6,7-DIHYDRO-1-METHYL-7-OXO-3-PROPYL-1-H-PYRAZOLE-[4.3-D]-PYRIMIDIN-5-YL)-4-ETHOXYPHENYL)-SULFONYL)-4-METHYLPIPERAZINE
• SILDENAFIL;5-[2-ETHOXY-5-(4-METHYL-PIPERAZINE-1-SULFONYL)-PHENYL]-1-METHYL-3-PROPYL-1,6-DIHYDRO-PYRAZOLO-[4,3-D]-PYRIMIDIN-7-ONE
• Sildenafil citrate
• 1-((3-(4,7-dihydro-1-methyl-7-oxo-3-propyl-1H-pyrazolo(4,3-d)pyrimidin-5-yl)-4-ethoxyphenyl)sulfonyl)-4-methylpiperazine
• Slidenafil
• 1-methyl-5-[2-ethoxy-5-(4-methylpiperazin 1-yl-sulphonyl)phenyl]-3-n-propyl-1,6-dihydro-7H-pyrazolo[4,3-d]pyrimidin-7-one
• Viagra
• 3-[2-ethoxy-5-(4-methylpiperazin-1-yl)sulfonyl-phenyl]-7-methyl-9-propyl-\r2,4,7,8-tetrazabicyclo[4.3.0]nona-2,4,8,10-tetraen-5-ol

This compound is available in the following databases:

Wiley Registry of Tandem Mass Spectral Data: MS for ID

Author: Herbert Oberacher, Institute of Legal Medicine, Innsbruck/Austria

The Wiley Registry® of Tandem Mass Spectral Data: MS for ID contains 10,000 positive and negative mode spectra of over 1200 compounds of interest for forensics, toxicology, and pathology. Learn more.

Mass Spectra of Designer Drugs 2024

Author: Peter Rösner

This library enables fast and reliable identification of the latest illegal designer drugs. It is updated annually. Learn more.

KnowItAll NMR Spectral Library

Author: Wiley

The KnowItAll NMR Spectral Library offers a comprehensive collection of NMR reference spectra, including NMR, CNMR, and XNMR, and covers a wide range of compounds including organics, polymers, monomers, metabolites, and more. Learn more.

KnowItAll IR, Raman, and UV-Vis Spectral Libraries

Author: Wiley

The KnowItAll IR, Raman, and UV-Vis spectral libraries offer access to the world's largest collection of IR, Raman, and UV-Vis spectra, including the renowned Sadtler spectra. The libraries include a wide range of compounds from pure organics to industrial compounds. Learn more.

KnowItAll Mass Spectral Library

Author: Wiley

The KnowItAll Mass Spectral Library offers a comprehensive collection of mass spectra, including the renowned Wiley Registry, and access to a wide range of compounds including pure organics, drugs, steroids, additives, geochemicals, petrochemicals, biomarkers, and more. Learn more.

Maurer, Meyer, Pfleger, Weber: GC-MS Library of Drugs, Poisons, and Their Metabolites 6th Edition

Author: Hans H. Maurer, Markus Meyer, Karl Pfleger, Armin A. Weber

Identification of trace drugs, poisons, and pollutants requires broad coverage of specific compound classes: metabolites, acetylated, methylated, trimethylsilylated, trifluoroacetylated, pentafluoropropionylated, and heptafluorobutyrylated compounds. Learn more.

Wiley Registry of Mass Spectral Data 2023

Author: Wiley

The foundation library for any analytical laboratory running mass spectrometry, the Wiley Registry provides the broadest coverage available in any mass spectral library Learn more.

Maurer, Meyer, Helfer, Weber: LC-HR-MS & MS Library of Drugs, Poisons, and Their Metabolites

Author: Hans H. Maurer, Markus Meyer, Andreas G. Helfer, Armin A. Weber

Developed by toxicologist Hans H. Maurer and his team, the Maurer/Meyer/Helfer/Weber LC-HR-MS/MS Library of Drugs, Poisons, and Their Metabolites consists of spectra for parent drugs or poisons, and their metabolites or artifacts, in various compound classification groups. This metabolite-based library helps minimize the risk of false negative LC-MS results. Learn more.