- Studies toward the synthesis of azadirachtin, part 1: total synthesis of a fully functionalized ABC ring framework and coupling with a norbornene domain. Nicolaou, K.C., Sasmal, P.K., Roecker, A.J., Sun, X.W., Mandal, S., Converso, A. Angew. Chem. Int. Ed. Engl. (2005)