phenanthridone

noun
phe·​nan·​thri·​done | \fə̇ˈnan(t)thrəˌdōn\
plural -s

Definition of phenanthridone 

: a crystalline lactam C13H9NO obtainable from phenanthridine by oxidation

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History and Etymology for phenanthridone

International Scientific Vocabulary phenanthridine + -one

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