1. Thomson Mass Spectrometry Laboratory, Institute of Chemistry University of Campinas—UNICAMP PO Box 6154 Campinas São Paulo 13083‐970 Brazil
2. Laboratory of Synthesis of Natural Products and Drugs, Institute of Chemistry University of Campinas—UNICAMP PO Box 6154 Campinas São Paulo 13083‐970 Brazil
3. Institute of Chemistry University of Campinas—UNICAMP PO Box 6154 Campinas São Paulo 13083‐970 Brazil
4. EaStCHEM School of Chemistry University of St Andrews North Haugh St Andrews KY16 9ST UK
5. MackMass Laboratory, School of Engineering—PPGEMN Mackenzie Presbyterian University Rua da Consolação, 896 São Paulo São Paulo 01302‐907 Brazil
6. Federal Institute of Education Science and Technology of Northern Minas Gerais—IFNMG PO Box 71 Salinas Minas Gerais 39560‐000 Brazil