PYRAZOLON
\pˈɪɹɐzˌɒlən], \pˈɪɹɐzˌɒlən], \p_ˈɪ_ɹ_ɐ_z_ˌɒ_l_ə_n]\
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An oxygen substitution compound, C3H4ON2, of pyrazolin. It is a weak antiseptic.
By Smith Ely Jelliffe