Chemistry Letters p. 209 - 212 (1991)
Update date:2022-08-03
Topics:
Hirano, Masafumi
Miyashita, Akira
Nohira, Hiroyuki
Photochromic spiroindolinobenzothiopyrans having a methacryloxymethyl group have been prepared and their colored forms were demonstrated to be a zwitterionic structure on the basis of the spectroscopic data.
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