Provided is a novel compound having an excellent suppression effect against arrhythmia including atrial fibrillation and being useful as a pharmaceutical product without antiviral effect. Disclosed is a compound represented by the following General Formula (I), a pharmaceutically acceptable salt thereof, or a solvate thereof (in the formula, the dotted line portion represents a single bond or a double bond; R1 represents an optionally substituted C1-6 alkyl group; Q represents an oxygen atom, a sulfur atom, or NR5; R2 represents —(C═O)—R6, —CHR6R7, or —CH2OR8; and R3 and R4, which may be identical or different, each represent an amino group, an azide group, or —X—R9, with the proviso that any one of R3 and R4 is an amino group).