Additionally, the indole Main is substituted at R3 that has a carbonyl group and that is also bonded into a napthalene moeity. Napthalene is actually a bicyclic framework of two fused benzene rings. This carbonyl bridge of JWH-018 classifies it to be a ketone. JWH-018 is an analog of THJ-018, https://cp-4767901.blogproducer.com/39856321/the-am-2201-diaries