(EN) A crystal of a compound shown by formula (Ul) or a solvate thereof: [Chemical formula 43](wherein Me is metnyl, and tin is benzyl)which has peaks in a powder X-ray diffraction spectrum at diffraction angle (26): 11.2° ± 0.2°, 17.2° ±0.2°, 17.7° ± 0.2°, 20.5° ± 0.2°, 22.0° ± 0.2° and 26.1° ± 0.2°.