The object is to develop an antiprotozoal remedy having a novel mechanism of action. Provided is a compound represented by a chemical formula (1), a prodrug or a pharmaceutically acceptable salt thereof, wherein within the formula (1), R1 represents R10— of formula (4) or R20— of formula (5); R2 represents CHO—, etc.; R3 represents a hydrogen atom, CH3—C(═O)—, etc.; R4 represents a hydrogen atom, CH3—C(═O)—, etc.; each of R11 and R12 independently represents each a hydrogen atom, a methyl group, etc.; R13 represents —CH2—, —CH(—OH)— or —C(═O)—; each of R21 and R22 independently represents eaeh a hydrogen atom, a methyl group, etc.; R23 represents —CH2—, —CH(—OH)— or —C(═0)—; and R24 represents a hydrogen atom, a hydroxyl group, a methyl group, etc.