Additionally, the indole core is substituted at R3 using a carbonyl group and that is also bonded to the napthalene moeity. Napthalene is a bicyclic structure of two fused benzene rings. This carbonyl bridge of JWH-018 classifies it as being a ketone. JWH-018 is definitely an analog of THJ-018, through https://zanegfbbz.spintheblog.com/33345120/the-smart-trick-of-jwh-073-that-nobody-is-discussing