i usually use a simple method of just taking untreated morning glory seeds, grinding them up and letting them sit in alcohol for about a day.strain the seed mush, then i drink the alcohol. if u are just doing about 250 seeds, 2 shots will do. try using something like everclear but i dont use that because i dont have any. i usually use the strongest alcohol i can get a hold of though.
there is more complicated ways of doing this, using things like petroleum ether which is really not available to the general public or using naptha but the alcohol is much easier and it works for me so i stick with that.