[List[int]]</span>
<span class="sd">        A list of label encoded and padded molecules, where each molecule is a list of</span>
<span class="sd">        integers representing the SMILES tokens. The integers are the labels of the</span>
<span class="sd">        tokens in the token2label dictionary. All molecules must be padded to the same</span>
<span class="sd">        length.</span>
<span class="sd">    token2label : Dict[str, int]</span>
<span class="sd">        A dictionary mapping SMILES tokens to int