Spiro[2H-indole-2,3'-[3H]naphth[2,1-b][1,4]oxazine], 6'-(2,3-dihydro-1H-indol-1-yl)-1,3-dihydro-1,3,3-trimethyl-

6'-(2,3-Dihydro-1H-indol-1-yl)-1,3,3-trimethyl-1,3-dihydrospiro[indole-2,3'-naphtho[2,1-b][1,4]oxazine]