code: public Pair<EntityInfo> getParentCompounds() {
  		Pair<Chain> chains = getParentChains();
  		if (chains == null) {
  			logger.warn("Could not find parents chains, compounds will be null");
  			return null;
  		}
  		return new Pair<EntityInfo>(chains.getFirst().getEntityInfo(), chains.getSecond().getEntityInfo());
  	}
docs: Finds the parent compounds by looking up the references of first atom of each side of this interface
  @return