Dimitar Borissov Gotchev Gotchev, D. B., & Comins, D. L. (2004). Novel heterocyclic systems. Synthesis of 2,7-dimethyl-10-oxa-1,8-diaza-anthracen-9-one and derivatives. TETRAHEDRON, 60(51), 11751–11758. https://doi.org/10.1016/j.tet.2004.09.111