Synthesis of Unsymmetrically Substituted 4,6,10-Trihydroxy-1,4,6,10-tetraazaadamantanes via Intramolecular Cyclization of Tris(β-oximinoalkyl)amines - Semakin, Artem N.; Sukhorukov, Alexey Yu.; Nelyubina, Yulia V.; Ioffe, Sema L.; Tartakovsky, Vladimir A. (Synthesis, 2012)