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# Long description

On the left is an 'H'. A line goes to the right to an 'O', and between the 'H' and the 'O' is large left bracket. A line goes to the right from the 'O' to a 'C'. Above the 'C' is a vertical line going to an 'H', and below the 'C' is another vertical line going to an 'H'. To the right of the 'C' is a horizontal line to another 'C'. Above the 'C' is a vertical line going to an 'H', and below the 'C' is another vertical line going to an 'H'. To the right of the 'C' is a horizontal line to an 'O'. Between the 'C' and the 'O' is a large right bracket, with a subscript 'n' to the right of it. A horizontal line goes to the right from the 'O' to an 'H'.