Also, the indole Main is substituted at R3 having a carbonyl group which is also bonded to the napthalene moeity. Napthalene can be a bicyclic construction of two fused benzene rings. This carbonyl bridge of JWH-018 classifies it as being a ketone. JWH-018 is undoubtedly an analog of THJ-018, in https://cp-4731850.mdkblog.com/38754323/a-simple-key-for-jwh-201-unveiled