A compound of Formula (I): or a pharmaceutically acceptable salt thereof, where: Q can be 5-methylpyridazin-3-yl, 5-chloropyridazin-3-yl, 6-methylpyridazin-3-yl, or 6-fluoropyridazin-3-yl; R can be hydrogen, fluoro, or methoxy; R1 can be hydrogen, methoxy, difluoromethoxy, or trifluoromethoxy; and R2 can be methyl or ethyl. The compound of formula (I) can inhibit glutaminase, e.g., GLS1.一種具有式(I)之化合物:或其藥學上可接受的鹽,其中:Q可以是5-甲基嗒-3-基、5-氯嗒-3-基、6-甲基嗒-3-基、或6-氟嗒-3-基;R可以是氫、氟、或甲氧基;R1可以是氫、甲氧基、二氟甲氧基、或三氟甲氧基;並且R2可以是甲基或乙基。該具有式(I)之化合物可以抑制穀胺酸醯胺酶,例如GLS1。