Molecular structure of 5,5-Bis(3-hydroxymercuri-2-methoxypropyl)barbituric acid sodium salt (CAS NO.73118-24-8) is:

Product Name: 5,5-Bis(3-hydroxymercuri-2-methoxypropyl)barbituric acid sodium salt
CAS Registry Number: 73118-24-8
IUPAC Name: disodium[3-[5-(3-mercurio-2-methoxypropyl)-2,4,6-trioxo-1,3-diazinan-5-yl]-2-methoxypropyl]mercurydihydroxide
Molecular Weight: 751.45594 [g/mol]
Molecular Formula: C₁₂H₂₀Hg₂N₂Na₂O₇
H-Bond Donor: 4
H-Bond Acceptor: 7 
Canonical SMILES: COC(CC1(C(=O)NC(=O)NC1=O)CC(C[Hg])OC)C[Hg].[OH-].[OH-].[Na+].[Na+]
InChI: InChI=1S/C12H18N2O5.2Hg.2Na.2H2O/c1-7(18-3)5-12(6-8(2)19-4)9(15)13-11(17)14-10(12)16;;;;;;/h7-8H,1-2,5-6H2,3-4H3,(H2,13,14,15,16,17);;;;;2*1H2/q;;;2*+1;;/p-2
InChIKey: GYXYZZVWGLUDLE-UHFFFAOYSA-L
Classification Code: Drug / Therapeutic Agent ;Organometallic

Merucury and its compounds are on the Community Right-To-Know List.

Poison by intraperitoneal route. See also MERCURY COMPOUNDS, INORGANIC; MERCURY COMPOUNDS, ORGANIC. When heated to decomposition it emits very toxic fumes of Na₂O, Hg and NO_x.

OSHA PEL: CL 0.1 mg(Hg)/m³ (skin)
ACGIH TLV: TWA 0.1 mg(Hg)/m³ (skin); BEI: 35 µg/g creatinine total inorganic mercury in urine preshift; 15 µg/g creatinine total inorganic mercury in blood at end of shift at end of workweek.
DFG MAK: Confirmed Animal Carcinogen with Unknown Relevance to Humans
NIOSH REL: (Mercury, Aryl and Inorganic) CL 0.1 mg/m³ (skin)

 5,5-Bis(3-hydroxymercuri-2-methoxypropyl)barbituric acid sodium salt , its cas register number is 73118-24-8. It also can be called Mercury, (5,5-(2,4,6-trioxo-(1H,3H,5H)-pyrimidylene))bis((2-methoxypropyl)hydroxy-, sodium salt .