tomatine

noun

tom·​a·​tine ˈtäm-ə-ˌtēn 

variants or tomatin

-ˌtin 

: a crystalline antibiotic glycosidic alkaloid C₅₀H₈₃NO₂₁ that is obtained especially from the juice of the stems and leaves of tomato plants resistant to wilt, that is active against fungi including some causing disease in humans, and that is used as a precipitating agent for steroids