2. Number the carbon chain so that the carbons with substituent other than hydrogen will have the lowest possible numbers (***not always left to right). 

3. Name the substituent's other than hydrogen by the appropriate carbon fragment prefix followed by "-yl". Think of substituent's as modifiers taking the adjective ending "-yl", and the carbon backbone as the main idea taking the noun ending -ane. Give a name and carbon-number location for each substituent, ordering the substituent's alphabetically. (Other orders besides alphabetical are used.)

4. Prefixes in front of alkyl groups (i.e. di-, tri-, tetra-, penta-...) are used to indicate how many of a particular alkyl group are found in the molecule. There must be one carbon-number location for each alkyl group. Prefixes are ignored in alphabetizing.

5. ALWAYS use a comma between numbers. ALWAYS use a hyphen between a number and a letter.