Return to Article Details 7',7''-{1,4-PHENYLENEDI(METHYLENE)BIS(5-CHLORO- 1,3,3-TRIMETHYL-1,3-DIHYDROSPIRO[INDOLE-2,3'-PYRANO[3,3-<i>f</i>]QUINOLINIUM])} DIIODIDE – A NOVEL INDOLINE SERIES SYMMETRICALLY CHARGED PHOTOCHROMIC BISSPIROPYRAN Download Download PDF