How many enzymes can Aripiprazole interact with?
SELECT COUNT ( DISTINCT T2.enzyme_id )  FROM medicine AS T1 JOIN medicine_enzyme_interaction AS T2 ON T2.medicine_id   =   T1.id WHERE name  =  "Aripiprazole"
count of enzymes = COUNT(DISTINCT enzyme_id); interact with refers to a JOIN operation between medicine and medicine_enzyme_interaction tables; Aripiprazole refers to filtering condition WHERE name = 'Aripiprazole';