The invention generally relates to nuclear transport modulators, e.g., CRM1 inhibitors, and, more particularly, to a compound represented by structural formula (I), or a pharmaceutically acceptable salt thereof, wherein the variables are as defined and described herein. The invention also includes the synthesis and use of a compound of structural formula I, or a pharmaceutically acceptable salt or composition thereof, e.g., in the treatment, modulation and/or prevention of physiological conditions associated with CRM1 activity.