SEARCH Articles Figures Tables 2-Oxindole Oxindol Spiro cyclohexanone-oxindole Spiro oxindole formation Spiro-fused 2-oxindoles Spiro-oxindole derivatives Spiro-oxindoles Spiro-oxindoles Spiro[4//-pyran-3.3 -oxindoles Spiro[pyrrolidin-3,3 -oxindoles Spiro[pyrrolidine-2,3’-oxindoles Spiro[pyrrolidine-2,3’-oxindoles libraries