61897-83-4 Isotryptoquivaline Spiro(furan-2(5H),9'(9H)imidazo(1,2-a)indole)-3',5(2'H)-dione, 1'-(acetyloxy)-1',3,4,9'a-tetrahydro-4-(2-(1-hydroxy-2-methylpropyl)-4-oxo-3(4H)-quinazolinyl)-2',2'-dimethyl-, (4'alpha(4S*(R*)),9'abeta)-(+)-