Sharma, KK; Hales, TG; Rao, VJ; NicDaeid, N; McKenzie, C. The search for the “next” euphoric non-fentanil novel synthetic opioids on the illicit drugs market: current status and horizon scanning Forensic Toxicol., 1 Jan 2019, 37 (1), 1–16. 1.1 MB. https://doi.org/10.1007/s11419-018-0454-5 #3,4-methylendioxy-U-47700
Popławska, M; Bednarek, E; Naumczuk, B; Kozerski, L; Błażewicz, A. Identification and structure characterization of five synthetic opioids: 3,4-methylenedioxy-U-47700, o-methyl-acetylfentanyl, 2-thiophenefentanyl, benzoylfentanyl and benzoylbenzylfentanyl Forensic Toxicol., 1 Jan 2021, 39 (1), 45–58. 992 kB. https://doi.org/10.1007/s11419-020-00539-6 #1 MS,NMR
Hasegawa, K; Minakata, K; Suzuki, M; Suzuki, O. Non-fentanyl-derived synthetic opioids emerging during recent years Forensic Toxicol., 1 Jul 2022, 40 (2), 234–243. 1.6 MB. https://doi.org/10.1007/s11419-022-00624-y #Table S1 (4)