VCS thor data tree format

This is the standard VCS format for a tree rooted in SMILES. 


			 $SMI<Root SMILES>
			     PAMW<Parent molecular weight>
			     PMF<Parent molecular formula>
			     $ISM<Parent Isomeric SMILES>
					VCS_ID<Supplier compound identifier>
			     $VCS_ID<Supplier compound identifier>
              				VCS_SUPP<Name of supplier>
				  	VISM<Version isomeric SMILES>
				  	.
				  	.
				  	.
                                        CAS<CAS Number>
					.
                                        Compound_Name<Local name>
				  	.

					AMW<Version average molecular weight>
					MF<Version molecular formula>
			      $CAS<CAS Number>
       	                         	VCS_ID<Supplier compound identifier>
					.
					.
			      $NAM<Local Name>
					VCS_ID<Supplier compound identifier>    
					.
					.
		              $VISM<Version isomeric SMILES>
					VCS_ID<Supplier compound identifier>
			  |

If there is no structure the format is 



                           $VCS_ID<Supplier compound identifier>
                                        VCS_SUPP<Name of supplier>
                                        .
                                        .
                                        .
                           |

In both cases the '.' represent data items in the original supplier's data source. There can be multiple subtrees which are shown in bold. Italicized entries are optional depending whether they are in the original data.