1. School of Natural Sciences, Linnaeus University, SE-391 82 Kalmar, Sweden, Laboratório de Triatomíneos e Epidemiologia da Doença de Chagas, Centro de Pesquisas René Rachou/FIOCRUZ, 30.190-002, Belo Horizonte, Minas Gerais, Brazil, and University of Hamburg, Organic Chemistry, Martin-Luther-King-Platz 6, D-20146 Hamburg, Germany