Application: Manufacturer of Vonoprazan RC 3; Vonoprazan 3-Formyl Impurity; 5-(2-Fluorophenyl)-1-(pyridin-3-ylsulfonyl)-1H-pyrrole-3-carbaldehyde (CAS: 881677-11-8) is useful as reference Impurity standard. Note: The compounds strictly supplied only for R&D /AR&D purpose, not for human/animal consumption.