![1,8-Diazabicyclo[5.4.0]undec-7-ene Non-nucleophilic Base Nucleophile 1,5-Diazabicyclo[4.3.0]non-5-ene - Black - Electrophile Transparent PNG](https://img1.pnghut.com/t/21/5/20/qfbzJRABC9/black-amidine-monochrome-area-organic-chemistry.jpg)
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