code: public static boolean hasNonDeuteratedEquiv(Atom atom, Group currentGroup) {
  		if(atom.getElement()==Element.D && currentGroup.hasAtom(replaceFirstChar(atom.getName(),'D', 'H'))) {
  			// If it's deuterated and has a non-deuterated brother
  			return true;
  		}
  		return false;
  	}
docs: Check to see if an Deuterated atom has a non deuterated brother in the group.
  @param atom the input atom that is putatively deuterium
  @param currentGroup the group the atom is in
  @return true if the atom is deuterated and it's hydrogen equive exists.