Cite

    R. Raja et al.. “Crystal structure of ethyl 1′, 5-di­methyl-2′′, 3-dioxo-3H-di­spiro­[benzo[b]thiophene-2, 3′-pyrrolidine-2′, 3′′-indoline]-4′-carboxyl­ate.” Acta crystallographica, vol. 71, n.d., p. . http://access.bl.uk/ark:/81055/vdc_100114919435.0x000001