In the sentence extracted from biomedical literature, identify all the chemical entities. The required answer format is the same sentence with HTML <span> tags to mark up specific entities. 
### Entity Markup Guides:
Use <span class="chemical"> to denote a chemical.

### Input Text: These effects suggest that the protection from hemolysis by tocopherols is related to a decreased TAM incorporation in condensed membranes and the structural damage of the erythrocyte membrane is consequently avoided .
### Output Text:
These effects suggest that the protection from hemolysis by <span class="chemical">tocopherols</span> is related to a decreased <span class="chemical">TAM</span> incorporation in condensed membranes and the structural damage of the erythrocyte membrane is consequently avoided . 