2h-indole

Spiro[2H-indole-2,3'-[3H]naphtho[2,1-b]pyran],1,3-dihydro-1,3,3-trimethyl-8'-nitro-

Spiro[2H-indole-2,3'-[3H]naphth[2,1-b][1,4]oxazine],1,3-dihydro-3,3-dimethyl-1-(phenylmethyl)-

3-amino-2-(diaminomethylidene)-2H-indole-6-carboximidamide