Complex sentence: Phytochemicals, chemical compounds that occur naturally in plants (phyto means "plant" in Greek), are responsible for color and organoleptic properties, such as the deep purple of blueberries and smell of garlic.
Split into simpler sentences: Phytochemicals, chemical compounds that occur naturally in plants (phyto means "plant" in Greek). Some are responsible for color and other organoleptic properties, such as the deep purple of blueberries and the smell of garlic.