metatags:1,2,3,6-Tetrahydrophthalic acid anhydride; 1,2,3,6-tetrahydrophthalicacidanhydride; 1,2,3,6-tetrahydro-phthalicanhydrid; 1,2,3,6-tetrahydrophthalicanhydride[qr]; 1,3-Isobenzofurandione, 3a,4,7,7a-tetrahy