Question: The short documentary film "Chau, Beyond the Lines" is about a 16 year-old disabled by an defoliant chemical widely used by the U.S. Military who aspires to design what?
Sentence (from "NAN-190"): It was previously believed to act as a selective 5-HT receptor antagonist, but a subsequent discovery showed that it also potently blocks the α-adrenergic receptor.
Relevant evidence: No