Hello spare, you then buy this yellow stuff. Have several attempts from different traders describing pretty much the same method for conversion. But none of them really worked or so low that it is not profitable, go via p2np, alpha-methylcinnamaldehyde or other routes that are in the forum. If there is a way to convert it and someone has done it. Can he share it...... I would be happy. Because as well as all proposed methods such as bmk 5449-12-7, are not possible. In particular, no one wants the real cas. Give so that you can do some research.