(1) Draw the correct structure (2) label each type of carbon with a letter (3) assign the same letter over the corresponding peak on the spectrum. (1) Draw the correct structure (2) identify the main groups on the spectrum (1) Draw the correct structure (2) label each type of carbon with a letter (3) assign the same letter over the corresponding peak on the spectrum. (1) Draw the correct structure (2) identify the main groups on the spectrum