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: Endocrine therapy consisted of testosterone heptylate or human chorionic gonadotropin for hypogonadism and bromocriptine for hyperprolactinemia .
### Output Text:
Endocrine therapy consisted of <span class="chemical">testosterone heptylate</span> or human chorionic gonadotropin for hypogonadism and <span class="chemical">bromocriptine</span> for hyperprolactinemia . 