Molecular structure of 3,4-Dihydroxy-thiophene-2,5-dicarboxylic acid dimethyl ester (CAS NO.58416-04-9) is:

Product Name: 3,4-Dihydroxy-thiophene-2,5-dicarboxylic acid dimethyl ester
CAS Registry Number: 58416-04-9
IUPAC Name: (2E,5E)-2,5-bis[hydroxy(methoxy)methylidene]thiolane-3,4-dione
Molecular Weight: 232.21052 [g/mol]
Molecular Formula: C₈H₈O₆S
XLogP3-AA: 1.4
H-Bond Donor: 2
H-Bond Acceptor: 6
Melting Point: 182 °C
Surface Tension: 64.892 dyne/cm
Density: 1.532 g/cm³
Flash Point: 182.745 °C
Enthalpy of Vaporization: 65.102 kJ/mol
Boiling Point: 378.558 °C at 760 mmHg

 3,4-Dihydroxy-thiophene-2,5-dicarboxylic acid dimethyl ester , its cas register number is 58416-04-9. It also can be called 2,5-Thiophenedicarboxylicacid, 3,4-dihydroxy-, dimethyl ester (6CI,9CI) ; Dimethyl 3,4-dihydroxythiophene-2,5-dicarboxylate ; 2,5-Thiophenedicarboxylicacid, 3,4-dihydroxy-, 2,5-dimethyl ester .