Find the name of students who have taken the prerequisite course of the course with title International Finance.
SELECT T1.name FROM student AS T1 JOIN takes AS T2 ON T1.id  =  T2.id WHERE T2.course_id IN (SELECT T4.prereq_id FROM course AS T3 JOIN prereq AS T4 ON T3.course_id  =  T4.course_id WHERE T3.title  =  'International Finance')
prerequisite course of a course refers to JOIN between course and prereq tables on course_id; students who have taken a course refers to JOIN between student and takes tables on id; course with title 'International Finance' refers to WHERE title = 'International Finance';