3′-Ethyl 5′-(2-methyl-2-propanyl) 2′-amino-2-oxo-6′-propyl-1,2-dihydrospiro[indole-3,4′-pyran]-3′,5′-dicarboxylate

2′-Amino-2-oxo-6′-propyl-1,2-dihydrospiro[indole-3,4′-pyran]-3′,5′-dicarboxylate de 3′-éthyle et de 5′-(2-méthyl-2-propanyle)

3′-Ethyl 5′-(2-methyl-2-propanyl) 2′-amino-2-oxo-6′-propyl-1,2-dihydrospiro[indole-3,4′-pyran]-3′,5′-dicarboxylate

3′-Ethyl-5′-(2-methyl-2-propanyl)-2′-amino-2-oxo-6′-propyl-1,2-dihydrospiro[indole-3,4′-pyran]-3′,5′-dicarboxylat

Spiro[3H-indole-3,4′-[4H]pyran]-3′,5′-dicarboxylic acid, 2′-amino-1,2-dihydro-2-oxo-6′-propyl-, 5′-(1,1-dimethylethyl) 3′-ethyl ester

5′-tert-butyl 3′-ethyl 2′-amino-2-oxo-6′-propyl-1,2-dihydrospiro[indole-3,4′-pyran]-3′,5′-dicarboxylate

tert-butyl 6-amino-5-(ethoxycarbonyl)-8-oxo-2-propylspiro[4H-pyran-4,3′-indoli ne]-3-carboxylate

tert-butyl 6-amino-5-(ethoxycarbonyl)-8-oxo-2-propylspiro[4H-pyran-4,3′-indoline]-3-carboxylate