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

摘要

New photochromic compounds corresponding to the formula of an indolinospirooxazine containing an indoline part and an oxazine part, where the oxazine part includes a five-membered unsaturated heterocyclic ring. …??The invention covers especially photochromic compounds where the said oxazine part is of the benzothiazolooxazine or indoleninooxazine type.