1. Abbiati G, Canevari V, Caimi S, Rossi E (2005) Domino addition/annulation of δ-alkynylaldehydes and oxygen nucleophiles: a new entry to [1,4]oxazino[4,3-a]indoles. Tetrahedron Lett 46:7117–7120
2. Almansour AI, Kumar RS, Arumugam N, Kanagalaksmi S, Suresh J (2012a) 5-Chlorospiro[indoline-3,7′-6H,7H,8Hpyrano[3,2-c:5,6-c′]di[1]benzopyran]-2,6′,8′-trione. Acta Crystallogr E68:o1172
3. Almansour AI, Kumar RS, Arumugam N, Vishnupriya R, Suresh J (2012b) 5-Methylspiro[indoline-3,7′-[6H,7H,8H]-pyrano[3,2-c:5,6-c′]di[1]benzopyran]-2,6′,8′-trione chloroform hemisolvate. Acta Crystallogr E68:o1194
4. Almansour AI, Kumar RS, Arumugam N, Shree PD, Suresh J (2012c) 5-Fluoro-6′H,7′H,8′H-spiro[indoline-3,7′-pyrano[3,2-c:5,6-c′]di-1-benzopyran]-2,6′,8′-trione. Acta Crystallogr E68:o744
5. Bacchi A, Carcelli M, Pelagatti P, Pelizzi G, Rodriguez-Arguelles MC, Rogolino D, Solinas C, Zani F (2005) Antimicrobial and mutagenic properties of organotin(IV) complexes with isatin and N-alkylisatin bisthiocarbonohydrazones. J Inorg Biochem 99:397–408