Harnstoff – Wikipedia
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Harnstoff – Wikipedia
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Urea - Simple English Wikipedia, the free encyclopedia
File:Urea Structural Formula V2.svg - Wikimedia Commons
File:Harnstoffbildung in Dihydrolevoglucosenon.svg - Wikipedia
File:Harnstoff-ion.svg - Wikimedia Commons
File:Zerfall von N-Nitrosoharnstoffen zu alkylierenden
Origins of Organic Chemistry and Organic Synthesis - Wentrup
Harnstoff – Wikipedia
Aquasabi - Carbamide / Urea - 500 g
Urea - Alchetron, The Free Social Encyclopedia
Quick Functional Group Question: Is this underlined group
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Urea 57-13-6
File:Urea&1,6-C6Cl2.png - Wikipedia
