Download full text in PDF Opens in a new window. Article suggestions will be shown in a dialog on return to ScienceDirect. ... Please enable JavaScript to use all the features on this page. ... Novel unsymmetrical photosensitive derivatives of maleic acid, anhydride and N-alkylimide, including coumarin and thiophene moieties, have been designed and synthesized; their photochromism study and fatigue resistance estimation are reported. ... Cookies are used by this site. To ...