Structure based on 1kek

Ideal structure
Name: 2-acetyl-thiamine diphosphate
Formula: C14 H21 N4 O8 P2 S
Weight: 467.351
SMILES: "CC(=O)c1sc(CCO[P](O)(=O)O[P](O)(O)=O)c(C)[n+]1Cc2cnc(C)nc2N"
Spacial conformation based on PDB 1kek.
Also present in other 10 PDB entries.
RESIDUE   HTL     50
CONECT      N1'    2 C2'  C6' 
CONECT      C2'    3 N1'  C2A  N3' 
CONECT      C2A    4 C2'  H2A1 H2A2 H2A3
CONECT      N3'    2 C2'  C4' 
CONECT      C4'    3 N3'  N4'  C5' 
CONECT      N4'    3 C4'  H4'1 H4'2
CONECT      C5'    3 C4'  C6'  C35 
CONECT      C6'    3 N1'  C5'  H6' 
CONECT      C35    4 C5'  N3   H351 H352
CONECT      N3     3 C35  C2   C4  
CONECT      C2     3 N3   S1   C1' 
CONECT      S1     2 C2   C5  
CONECT      C5     3 S1   C4   C5A 
CONECT      C4     3 N3   C5   C4A 
CONECT      C4A    4 C4   H4A1 H4A2 H4A3
CONECT      C5A    4 C5   C5B  H5A1 H5A2
CONECT      C5B    4 C5A  O5G  H5B1 H5B2
CONECT      O5G    2 C5B  P1  
CONECT      P1     4 O5G  O11  O12  O13 
CONECT      O11    2 P1   P2  
CONECT      O12    1 P1  
CONECT      O13    2 P1   HO1 
CONECT      P2     4 O11  O21  O22  O23 
CONECT      O21    1 P2  
CONECT      O22    2 P2   H22O
CONECT      O23    2 P2   H23O
CONECT      C1'    3 C2   O2'  C3' 
CONECT      O2'    1 C1' 
CONECT      C3'    4 C1'  H3'1 H3'2 H3'3
CONECT      H2A1   1 C2A 
CONECT      H2A2   1 C2A 
CONECT      H2A3   1 C2A 
CONECT      H4'1   1 N4' 
CONECT      H4'2   1 N4' 
CONECT      H6'    1 C6' 
CONECT      H351   1 C35 
CONECT      H352   1 C35 
CONECT      H4A1   1 C4A 
CONECT      H4A2   1 C4A 
CONECT      H4A3   1 C4A 
CONECT      H5A1   1 C5A 
CONECT      H5A2   1 C5A 
CONECT      H5B1   1 C5B 
CONECT      H5B2   1 C5B 
CONECT      H22O   1 O22 
CONECT      H23O   1 O23 
CONECT      H3'1   1 C3' 
CONECT      H3'2   1 C3' 
CONECT      H3'3   1 C3' 
CONECT      HO1    1 O13 
END   
HET    HTL             50
HETSYN     HTL 2-ACETYL-3-[(4-AMINO-2-METHYL-5-PYRIMIDINYL)METHYL]-4-M
HETSYN   2 HTL ETHYL-5-(4,6,6-TRIHYDROXY-3,5-DIOXA-4,6-DIPHOSPHAHEX-1-
HETSYN   3 HTL YL)THIAZO LIUM INNER SALT P,P'-DIOXIDE
HETNAM     HTL 2-ACETYL-THIAMINE DIPHOSPHATE
FORMUL      HTL    C14 H21 N4 O8 P2 S1 1+

This OCA MONOMER page
uses Jmol, developed by the Jmol Development Team (color reference)
OCA© by Jaime Prilusky, 1996-2004,2006,2010,2014
Bioinformatics Unit
Weizmann Institute of Science