116743-81-8 Ethyl 7'-amino-5-fluoro-1,1',2,2',3',4'-hexahydro-2,2',4'-trioxospiro(3H-indole-3,5'-(5H)pyrano(2,3-d)pyrimidine)-6'-carboxylate Spiro(3H-indole-3,5'(5H)-pyrano(2,3-d)pyrimidine)-6'-carboxylic acid, 1,1',2,2',3',4'-hexahydro-7'-amino-5-fluoro-2,2',4'-trioxo-, ethyl ester Spiro(3H-indole-3,5'-(5H)pyrano(2,3-d)pyrimidine)-6'-carboxylic acid, 7'-amino-5-fluoro-1,1',2,2',3',4'-hexahydro-2,2',4'-trioxo-, ethyl ester