IUPAC:1-[({3',6'-dihydroxy-3-oxo-3H-spiro[2-benzofuran-1,9'-xanthen]-5-yl}carbamothioyl)amino]-3,6,9,12-tetraoxapentadecan-15-oic acid
IUPAC:1-[({3',6'-dihydroxy-3-oxo-3H-spiro[2-benzofuran-1,9'-xanthen]-5-yl}carbamothioyl)amino]-3,6,9,12-tetraoxapentadecan-15-oic acid