alkyl group article 6 chemical bond 6 unclassified drug 6 alkene 4 alkylation 4 amine 4 drug synthesis 4 oxygen 4 priority journal 4 substitution reaction 4 synthesis 4 1,1' azobis(cyclohexanecarbonitrile) 2 2 amino 3 decylpteridin 4(3h) one 2 4 (decyloxy)pteridin 2 amine 2 Addition reactions 2 Alkenes 2 Alkylation 2 Article 2 Azo compound 2 Calorimetry 2 Carbon-carbon bond formation reactions 2 Chagas disease 2 Chemical bonds 2 Crystallography, X-Ray 2 Dioxygens 2 Double bonds 2 Drug Design 2 Electron withdrawing group 2 Electron-rich alkenes 2