Thioxanthone Derivatives, Composition Comprising the Same and Pattern Forming Method Comprising Said Composition

A compound which is selected from:

• 2,3-dimethoxy-9H-thioxanthen-9-one, 2,3-dihydroxy-9H-thioxanthen-9-one, 2,3,5-trimethoxy-9H-thioxanthen-9-one, 2,3,7-trimethoxy-9H-thioxanthen-9-one, 1,5,6-trihydroxy-9H-thioxanthen-9-one, 1,5,6-trimethoxy-9H-thioxanthen-9-one, 3,4-dihydroxy-9H-thioxanthen-9-one, 3,4-dimethoxy-9H-thioxanthen-9-one, 3′,4′-dimethoxyspiro[1,3-dioxane-2,9′-thioxanthene], 3′,4′-dimethoxyspiro[1,3-dioxolane-2,9′-thioxanthene], 2′,3′-dimethoxyspiro[(1.3)-dioxolane-2,9′-thioxanthene], 3,4-bis(benzyloxy)-9H-thioxanthen-9-one, 3,4-bis(1-ethoxyethyl)-9H-thioxanthen-9-one, di-t-butyl (9-thioxo-9H-thioxanthene-3,4-diyl)dicarbonate, methane;2′-methoxy-5,6-dimethyl-spiro[1,3-dioxepane-2,6′-thiochromeno[3,2-g][1,3]benzodioxole], 2-methoxythiochromeno[3,2-g][1,3]benzodioxol-6-one, 2′-methoxyspiro[1,3-dioxane-2,6′-thiochromeno[3,2-g][1,3]benzodioxole], 2′-methoxyspiro[1,3-dioxepane-2,6′-thiochromeno[2,3-g][1,3]benzodioxole], 2′-methoxy-5,5-dimethyl-spiro[1,3-dioxane-2,6′-thiochromeno[2,3-e][1,3]benzodioxole], 2′-methoxy-4,6-dimethyl-spiro[1,3-dioxane-2,6′-thiochromeno[3,2-g][1,3]benzodioxole], 2′-methoxy-4,7-dimethyl-spiro[1,3-dioxepane-2,6′-thiochromeno[2,3-e][1,3]benzodioxole], 2′-methoxy-5,5-dimethyl-spiro[1,3-dioxepane-2,6′-thiochromeno[2,3-e][1,3]benzodioxole], 2′-methoxy-5-methyl-spiro[1,3-dioxepane-2,6′-thiochromeno[2,3-e][1,3]benzodioxole], 2′-ethoxyspiro[1,3-dioxepane-2,6′-thiochromeno[2,3-e][1,3]benzodioxole], 2′-propoxyspiro[1,3-dioxepane-2,6′-thiochromeno[3,2-g][1,3]benzodioxole], 2′-phenoxyspiro[1,3-dioxepane-2,6′-thiochromeno[2,3-e][1,3]benzodioxole], 2′-isopropoxyspiro[1,3-dioxepane-2,6′-thiochromeno[2,3-e][1,3]benzodioxole], 2′-ethoxyspiro[1,3-dioxane-2,6′-thiochromeno[3,2-g][1,3]benzodioxole], 2′-ethoxyspiro[1,3-dioxolane-2,6′-thiochromeno[2,3-e][1,3]benzodioxole], 2′-propoxyspiro[1,3-dioxane-2,6′-thiochromeno[3,2-g][1,3]benzodioxole], 2′-propoxyspiro[1,3-dioxolane-2,6′-thiochromeno[2,3-e][1,3]benzodioxole], 2′-isopropoxyspiro[1,3-dioxane-2,6′-thiochromeno[2,3-e][1,3]benzodioxole], 2′-isopropoxyspiro[1,3-dioxolane-2,6′-thiochromeno[3,2-g][1,3]benzodioxole], 2′-methoxyspiro[1,3-dioxane-2,6′-thiochromeno[2,3-e][1,3]benzodioxole], 2′-methoxyspiro[1,3-dioxolane-2,6′-thiochromeno[2,3-e][1,3]benzodioxole], spiro[1,3-dioxolane-2,9′-thioxanthene]-3′,4′-diol, spiro[1,3-dioxane-2,9′-thioxanthene]-3′,4′-diol, spiro[1,3-dioxepane-2,9′-thioxanthene]-3′,4′-diol, 5-methylspiro[1,3-dioxepane-2,9′-thioxanthene]-3′,4′-diol, 5,5-dimethylspiro[1,3-dioxepane-2,9′-thioxanthene]-3′,4′-diol, 2-ethoxythiochromeno[2,3-e][1,3]benzodioxol-6-one, 3′,4′-dimethoxy-4,6-dimethyl-spiro[1,3-dioxane-2,9′-thioxanthene], 3′,4′-dimethoxy-4,5-dimethyl-spiro[1,3-dioxolane-2,9′-thioxanthene], 9,9-diethoxy-3,-dimethoxy-thioxanthene, 2-methoxy-6,6-dipropoxy-thiochromeno[3,2-g][1,3]benzodioxole or 6,6-diethoxy-2-methoxy-thiochromeno[2,3-e][1,3]benzodioxole.