toxTree.query
Classes 
AliphaticCHQueryAtom
AssociationQueryBond
CHQueryAtom
FunctionalGroups
MolAnalyser
MolFlags
MyAssociationBond
QueryAtomContainers
ReallyAnyAtom
SimpleReactions
SingleOrDoubleQueryBond
TopologyAnyAtom
TopologyAnyBond
TopologyOrderQueryBond
TopologySymbolQueryAtom