# Naming Alkenes with double bond branches?

This has confused me for so long, after reading the IUPAC rules over and over, I found the parent chain to be from the the CH2 numbered 1 to the one numbered 9, and I considered both CH3's as branches, however my confusion lies in naming the branch in the middle (with the circle around it) since it contains a double bond.

According to the current version of Nomenclature of Organic Chemistry – IUPAC Recommendations and Preferred Names 2013 (Blue Book), the traditional name ‘vinyl’ for $$\ce{CH2=CH-{}}$$ is no longer used for preferred IUPAC names and is only retained for general nomenclature. The preferred name is the systematic name ‘ethenyl’.