Kharga if you still need to redeem your redemption code then please see Serial number, Redemption, and Product codes | Student & Teacher Editions.
If your code has already been utilized then it is likely the serial number is available under your account at http://www.adobe.com/. You can find more details at Find your serial number quickly - http://helpx.adobe.com/x-productkb/global/find-serial-number.html.