ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI%3DInChI%3D1S/C20H38/c1-7-15%282%299-11-17-16%283%2910-12-18-19%284%2C5%2913-8-14-20%2817%2C18%296/h15-18H%2C7-14H2%2C1-6H3/t15-%2C16%2B%2C17%2B%2C18%2B%2C20-/m1/s1/file?format=sdf&get3d=True  -- InChI%3DInChI%3D1S/C20H38/c1-7-15%282%299-11-17-16%283%2910-12-18-19%284%2C5%2913-8-14-20%2817%2C18%296/h15-18H%2C7-14H2%2C1-6H3/t15-%2C16%2B%2C17%2B%2C18%2B%2C20-/m1/s1 could not be loaded.