INDOLINO-SPIROQUINOXALINO OXAZINE PHOTOCHROMIC COMPOUNDS, METHOD FOR THEIR PREPARATION, PHOTOCHROMIC COMPOSITIONS AND ARTICLES CONTAINING SUCH COMPOUNDS

摘要

New photochromic compounds. They correspond to the formula of an indolinospirooxazine comprising an indolinic part and an oxazine part where the oxazine part comprises an unsaturated heterocyclic ring with six biaza chain links of pyrimidine type in a nucleus of quinazoline type.