1(3H)-isobenzofuranone, 3-(1,3-dithiolan-2-ylidene)- 3-(1,3-dithiolan-2-ylidene)-2-benzofuran-1(3H)-one InChI=1/C11H8O2S2/c12-10-8-4-2-1-3-7(8)9(13-10)11-14-5-6-15-11/h1-4H,5-6H