Sources:
	Images: http://www.iapr-tc11.org/mediawiki/index.php/Chem-Infty_Dataset:_A_ground-truthed_dataset_of_Chemical_Structure_Images
	Ground Truth:  http://www.iapr-tc11.org/mediawiki/index.php?title=ChemInfty_-_Chemical_Structure_GT   [ SDF format - see web page for details ]

NOTES:
- The 'focused' ground truth is a subset of smaller molecules identified by Igor
  Fillipov (of the OSRA system). 

