Also Called: 2,3,5,6-Tetrahydro-2-methylphthalic anhydride(Note: see also CAS No 1694-82-2; 3425-89-6; 5333-84-6; 11070-44-3; 26590-20-5 & 34090-76-1);2,3,5,6-tetrahydro-2-methylphthalic anhydride;1,3-Isobenzofurandione, 3a,4,7,7a-tetrahydro-3a-methyl-;anidrido 2,3,5,6-tetra-hidro-2-metilftálico;2,3,5,6-tetrahidro-2-metilftálsav-anhidrid