(4R)-7-(Dimethylamino)-4′,4′-dimethyl-2-phenyl-3′,4′-dihydro-5′H-spiro[chromene-4,2′-pyrano[3,2-c]chromen]-5′-one

(4R)-7-(Dimethylamino)-4′,4′-dimethyl-2-phenyl-3′,4′-dihydro-5′H-spiro[chromene-4,2′-pyrano[3,2-c]chromen]-5′-one

Spiro[4H-1-benzopyran-4,2′-[2H,5H]pyrano[3,2-c][1]benzopyran]-5′-one, 7-(dimethylamino)-3′,4′-dihydro-4′,4′-dimethyl-2-phenyl-, (4R)-