for the following products
10-(2-Benzothiazolyl)-2,3,6,7-tetrahydro-2,2,6,6-tetramethyl-1H-5H-[1]benzopyrano[6,7,8-ij]quinolizin-11-one and 10-(2-Benzothiazolyl)-2,3,6,7-tetrahydro-1,1,7,7-tetramethyl-1H,5H,11H-(1)-benzopyrano(6,7-8-ij)quinolizin-11-one