Two torilpenan 1.5 hydrate crystals are simple and reliable. It has excellent stability and dissolubility. In powdery X-ray diffraction diagram, a torilpenan crystal has main peak at diffraction angle 2 theta=6.45, 13.05, 14.99, 15.31, 15.89, 16.64, 17.50, 18.07, 19.67, 20.65, 21.07, 22.17, 23.44, 23.90, 24.49, 26.08, 27.57, 28.22, 29.00, 31.69, 34.97, 38.08 and 39.87; another torilpenan crystal has main peak at diffraction angle 2 theta=12.91, 14.87, 15.75, 16.52, 20.52, 20.97, 22.05, 23.31, 23.79, 24.37, 25.98, 27.43, 28.12, 28.85 and 34.08.