6x4p
Human cyclophilin a bound to a series of acylcic and macrocyclic inhibitors: (2r,5s,11s,14s,18e)-2,11,17,17-tetramethyl-14-(propan-2-yl)-15-oxa-3,9,12,26,29-pentaazatetracyclo[18.5.3.1~5,9~.0~23,27~]nonacosa-1(25),18,20(28),21,23,26-hexaene-4,10,13,16-tetrone (compound 28)