ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI%3DInChI%26%2361%3B1S/C4H8O4/c5-1-3%287%294%288%292-6/h1%2C3-4%2C6-8H%2C2H2/t3-%2C4%2B/m0/s1/file?format=sdf&get3d=True -- InChI%3DInChI%26%2361%3B1S/C4H8O4/c5-1-3%287%294%288%292-6/h1%2C3-4%2C6-8H%2C2H2/t3-%2C4%2B/m0/s1 could not be loaded.