Color former Red I-6B; 3,3-bis(2-methyl-1-octyl-1H-indol-3-yl)-1(3H)-Isobenzofuranone; CK-16; Pergascript Red I 6B; 3,3'-Bis(1-n-octyl-2-methylindol-3-yl)phthalide; 3,3-Bis(2-methyl-1-octyl-1H-indol-3-yl)phthalide; 3,3-Bis(N-octyl-2-methyl indole)phthalide; 3,3-bis(2-methyl-1-octyl-1H-indol-3-yl)-2-benzofuran-1(3H)-one; 3,3-bis(2-methyl-1-octylindol-3-yl)-2-benzofuran-1-one;