Question

Initially approved to treat psoriasis (a skin disorder) and rheumatoid arthritis, the drug tofacitinib has recently been found to also promote hair growth and restore hair loss. ON NH Tofacitinib Draw the structure of tofacitinib, showing all carbon atoms and hydrogen atoms explicitly. Identify the number of carbon atoms in tofacitinib, and then fill in all of the missing hydrogen atoms that are inferred by the drawing. Edit

Answer 1

Carbon has for valence electrons so it can form four bonds with other atoms and nitrogen can form three bonds with other atoms. The structure of tofacitinib, showing all carbon and hydrogen atoms is shown as follows: H H HH H / SH .— o CH I— HH H I Therefore, the number of carbon atoms in the tofacitinib is 16.