C21H30O5 is its molecular formula
The hydroxyl groups at positions 17 and 21 and the oxo groups at positions 3, 11, and 20
They are substituted in the C21 steroid cortisone. Both a mouse and a human metabolite, it serves a purpose.
A chemical formula is a way to communicate information in chemistry about the proportions of atoms that make up a specific chemical compound or molecule. Chemical element symbols, numbers, and occasionally other symbols like parentheses, dashes, brackets, commas, and plus and minus signs are used to represent the chemical elements .
A molecule's molecular formula reveals which atoms and how many of each kind are included within it. No subscript is used if there is just one atom of a certain kind. A subscript is added to the symbol for an atom if it contains two or more of a certain type of atom.
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