The Stepan company in New Jersey is the only entity legally allowed to import coca leaves (aside from the DEA, ICE, the FBI and a few others that buy and sell all the time) and extract the illegal methyl benzoyl ecgonine (C17H21NO4) leaving the flavor compounds. Query whether they would sell the de-cocainized product to a soft drink hobbyist. Friends in Colombia report that Sek Cola sold there has the ecgonine ingredient. Not sure how close the recipe replicates the original Atlanta beverage.