Yeah,bought some,very cheap, had it tested,came back dybutylone,was no good in my opinion,no matter how i did it couldnt get there till i went over the line,just a lil,and was very uncomfertable and i love it all,street blast(angel dust),acid,a pvp,4f-mph,mush,stp,mda,pretty much everything...strung out fent 10yrs runnin. Along w speed I mean theres hardly anything i dont like cept x,but thats cuz im so wired all the time it doesnt work.having said that,ku was a wasted test unless it helps some of you save some cash.evidently was high purity also. So there ya have it.ha! But u prolly know this by now,was jus cruisin and saw your ques.