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: Moreover , L - NOArg and 7 - NI but not L - NIL intensify antihyperalgesic activity of HOE 140 or des - Arg10HOE 140 in toxic neuropathy .
### Output Text:
Moreover , L - NOArg and 7 - NI but not L - NIL intensify antihyperalgesic activity of <span class="chemical">HOE 140</span> or <span class="chemical">des - Arg10HOE 140</span> in toxic neuropathy . 