List of formulas of potential products. E.g., ['Li','O2','Mn'].

def get_products(self):
        """
        List of formulas of potential products. E.g., ['Li','O2','Mn'].
        """
        products = set()
        for _, _, _, react, _ in self.get_kinks():
            products = products.union(set([k.reduced_formula
                                           for k in react.products]))
        return list(products)