Moreover, the indole core is substituted at R3 having a carbonyl team which happens to be also bonded to some napthalene moeity. Napthalene is really a bicyclic construction of two fused benzene rings. This carbonyl bridge of JWH-018 classifies it being a ketone. JWH-018 is surely an analog of THJ-018, https://am67814792.tinyblogging.com/the-2-minute-rule-for-am-scs-76619309