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Chemical Formula for Coffee?
There are over 1000 aromatic in coffee. You can see some of them on the following website: http://www.rsc.org/chemistryworld/Issues/2011/May/ChemistryInEveryCup.asp.
If you want the chemical formula for caffeine, it is ##"C"_8"H"_10"N"_4"O"_2##. https://pubchem.ncbi.nlm.nih.gov/summary/summary.cgi?cid=2519
It's structural formula is: