450394
  -OEChem-03010813452D

  6  6  0     0  0  0  0  0  0999 V2000
   -0.6384    0.9079    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
    1.1655    0.7459    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
    0.3445   -0.0749    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    0.3445   -0.7849    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -1.2354   -0.1250    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -1.2354   -0.7849    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
  1  3  1  0  0  0  0
  1  5  1  0  0  0  0
  2  3  2  0  0  0  0
  3  4  1  0  0  0  0
  4  6  2  0  0  0  0
  5  6  1  0  0  0  0
M  END
> <PUBCHEM_COMPOUND_ID_TYPE>
0

> <PUBCHEM_TOTAL_CHARGE>
0

> <PUBCHEM_SUBSTANCE_ID>
450394

> <PUBCHEM_SUBSTANCE_VERSION>
2

> <PUBCHEM_EXT_DATASOURCE_NAME>
DTP/NCI

> <PUBCHEM_EXT_DATASOURCE_REGID>
197009

> <PUBCHEM_SUBSTANCE_COMMENT>
DTP/NCI from molfile.  Release-June 2007.
Structure Evaluation:Consistent with Molecular Formula.
Deposition record created from database webdb on host dtpiv1.ncifcrf.gov on Feb 22, 2008

> <PUBCHEM_SUBSTANCE_SYNONYM>
.DELTA..alpha.,.beta.-Butenolide
.DELTA..alpha.,.beta.-Butolide
.gamma.-Crotonolactone
.gamma.-Hydroxycrotonic acid lactone
2(5H)-Furanone
2-Buten-4-olide
2-Butenoic acid, 4-hydroxy-, .gamma.-lactone
2-Butenoic acid-.gamma.-lactone
2-Butenolide
4-Hydroxy-2-butenoic acid .gamma.-lactone
4-Hydroxy-2-butenoic acid lactone
497-23-4
Butenolide
Crotonolactone
Isocrotonolactone
NSC197009

> <PUBCHEM_GENERIC_REGISTRY_NAME>
497-23-4

> <PUBCHEM_XREF_EXT_ID>
197009

> <PUBCHEM_EXT_DATASOURCE_URL>
http://dtp.nci.nih.gov/

> <PUBCHEM_EXT_SUBSTANCE_URL>
http://dtp.nci.nih.gov/dtpstandard/servlet/dwindex?searchtype=NSC&outputformat=html&searchlist=197009

> <PUBCHEM_CID_ASSOCIATIONS>
10341  1

$$$$