A cell-permeable pyrazole derivative that acts as a selective blocker of Stim1 and Orai1-coupled CRAC (Ca2+ release-activated Ca2+) channel-mediated SOCE (store-operated Ca2+ entry) in RBL-2H3 cells (IC50 = 490nM by Fura-2), while exhibiting much reduced potency against the transient receptor potential cation channel TRPC3-medated ROCE (receptor-operated Ca2+ entry) upon carbachol stimulation in TRPC3-expressing HEK293 cells (IC50 = 18.46uM; by Fura-2). A great complement to Pyr2, Pyr3, and Pyr10 in Ca2+ signaling studies.