AK Chibisov, H Görner - Physical Chemistry Chemical Physics, 2001 - pubs.rsc.org
The photocolouration of five spiro [2H-1-benzopyran-2, 2′-indoline] compounds (1–5) and
two spironaphthopyranindolines (6, 7) to give the ring-opened merocyanine (s) and the …