Described herein are compounds and compositions useful for preventing and/or treating a disease or condition, e.g., a disease or condition associated with activity of p97 protein, e.g., cancer or a neurodegenerative disorder. In one aspect, the present disclosure provides a compound of formula (I) or a pharmaceutically acceptable salt thereof, wherein the variables R¹, R², R³, R⁴, R⁵, R⁶, R⁷, m and n are as defined herein.