The current methodology used in quality control of Ecuadorian beverages such as Pájaro azúl, Puro and Pata de vaca is carried out by using conventional gas chromatography; however, it does not allow the fingerprinting of these Ecuadorian spirit beverages and their possible cases of adulteration | Comprehensive two-dimensional gas chromatography mass spectrometry combined with multivariate data analysis for pattern recognition in Ecuadorian spirits