Clemson has a site license for ChemDraw.
Follow CCIT's directions to get your own serial number for ChemDraw.:
The serial number will be emailed to you shortly. In case you do not see an email with your codes within a short period of time, please check your spam filters or visit http://www.cambridgesoft.com/login, log in with your email ID and password, click on My Downloads. You will find the details and the serial number of your license.