Chemical formula of Cocaine. Close-up.

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Photo credit: © Ekaterina Minaeva / Alamy / Afripics
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Keywords: black, c17h21no4, chemical, chemistry, cocaine, coke, design, drawing, drug, education, formula, handwriting, healthcare, healthy, lifestyle, medicine, molecular, molecule, narcotic, notebook, paper, pattern, pen, research, science, sign, structure, study, symbol, technology, text, white, writing