Tetrahydrocannabinol acetate a colorless odorless marijuana extract was used to lace a cigarette or food substance without detection.Initially the experiments were done on volunteer U.S.

• Tetrahydrocannabinol acetate（麻醉用四氢大麻醇醋酸药），一种无色无味的大麻提取物，被用于放到一根香烟或食品物质里，而不受察觉，最初，实验是在美国军队的志愿兵和战略物资局人员中进行。