The urine of a binturong is known for smelling like buttered popcorn or freshly made caramel. This unique smell is due to the presence ofcertain chemical compounds in their urine, such as 2-Acetyl-1-pyrroline (2-AP), which is also found in popcorn and caramel and is responsible for their distinctive aroma. Binturongs use their scent tocompounds such as 2-acetyl-1-pyrroline and 2-acetyl-2-thiazoline in the urine. These same compounds are also responsible for the characteristic aroma of popcorn and caramel. The reason behind this smell is still not completely understood, but it is believed to play a role in communication and marking of territory for the binturong.