ChemInform Abstract: Hetero‐Annulation Reaction Between 2‐Acylnaphthoquinones and 2‐Aminobenzothiazoles. A New Synthetic Route to Antiproliferative Benzo[g]benzothiazolo[2, 3‐b]quinazoline‐7, 12‐quinones. Issue 49 (December 2015)