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 R 1 represents an optionally substituted C 1-6 alkyl group Q represents an oxygen atom, a sulfur atom, or NR 5 R 2 represents - (C=O)-R 6 , -CHR 6 R 7 , or-CH 2 OR 8 and R 3 and R 4 , which may be identical or different, each represent an amino group, an azide group, or -X-R 9 , with the proviso that any one of R 3 and R 4 is an amino group).
