[EN] PHOTOCHROMIC COMPOUNDS, COMPOSITIONS AND ARTICLES<br/>[FR] COMPOSÉS, COMPOSITIONS ET ARTICLES PHOTOCHROMIQUES
申请人:TRANSITIONS OPTICAL INC
公开号:WO2012082236A1
公开(公告)日:2012-06-21
The present invention provides a compound represented by the Formula (I): Wherein substituents R16, R17 and R17' are each independently selected from an electron withdrawing group having a Hammett op value of from 0.05 to 0.85, provided that one of R16 and R17 is hydrogen.