methyl 8’-acetoxy-1,3,3,5,6-pentamethyl-2,3-dihydrospiro[1H-indole-2,3’-naphtho[2,1-b][1,4]oxazine]-9’-carboxylate,
8’-acetossi-1,3,3,5,6-pentametil-2,3-diidrospiro[1H-indol-2,3’-nafto[2,1-b][1,4]ossazina]-9’-carbossilato di metile,