1,4-Benzoquinoneimine 2,5-Cyclohexadien-1-one, 4-imino- 3-07-00-03365 (Beilstein Handbook Reference) 3009-34-5 4-Imino-2,5-cyclohexadien-1-one BRN 1851461 PBQI p-Benzoquinone imine p-Benzoquinone monoimine p-Benzoquinonimine p-Quinonimine