Assertion: morphine | /r/HasProperty | phenanthrene
Facets:
Source sentences:
text: There are three main classes of opioids – those that are structurally like morphine (the phenanthrenes), those that resemble fentanyl (the phenylpiperidines), and those that resemble methadone (the phenylheptylamines).
text: Morphine is a phenanthrene opioid receptor agonist â€