Chemical formula of Vitamin B1 with black pen. Close-up.

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Photo credit: © Ekaterina Minaeva / Alamy / Afripics
License: Royalty Free
Model Released: No

Keywords: b1, black, c12h17n4os, chemical, chemistry, design, drawing, education, formula, handwriting, healthcare, healthy, lifestyle, medicine, molecular, molecule, notebook, paper, pattern, pen, research, science, sign, structure, study, symbol, technology, text, thiamin, thiamine, vitamin, white, writing