Complex sentence: The oil is used extensively as a source of important perfumery chemicals like citronellal, citronellol and geraniol, which find extensive use in soap, perfumery, cosmetic and flavouring industries throughout the world.
Split into simpler sentences: The oil is used extensively as a source of perfumery chemicals such as citronellal, citronellol and geraniol. These chemicals find extensive use in soap, perfumery, cosmetic and flavouring industries throughout the world.