Exactly, according to my 7-8 year experience the king was 5F-SGT-151. Super difficult synthesis. 5F-ADB and 5F-MDMB-2201 were a slight level lower but still super potent. And from the noids hitting market the past year 6cl-adb-a is the strongest and then 5cl-adb-a. Still both of them are not like the king 5F-SGT-151 (5F-CUMYL-PEGACLONE). For a traditional 10 year noid smoker this ADB-Butinaca everybody is selling now is very very mild and low potency, and they won't come back for it , like they would for 6cl-adb-a. You need to double the quantity of applying butinaca on your "means" to get half the effects of 6cl-adb-a. We are currently trying to find this precursor cas. 1971007-89-2 - IUPAC - Methyl (S)-2-(1H-indazole-3-carboxamido)-3,3-dimethylbutanoate to try the current theread recipe , either with 1-bromo-5-pentene (probably result in 5cl-adb-a) or with 1-bromo-5-fluoropentane (probably result in something stronger). We are finding all ingredients domestically (EU), but for some reason, while even the fluoropentane has a normal price (expensive as molecule, but normal, i think it's a "fatty liquid") the pentene is super expensive. We just got scammed again on the precursor described above. And while we ordered some of the materials domesticaly we started looking for the precursor again. And sorry if I am violating rules about "sourcing" , but I am so fruhstrated...