ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI%3DInChI%3D1S/C6H6N12O12/c19-13%2820%297-1-2-8%2814%2821%2922%295%287%296-9%2815%2823%2924%293%2811%281%2917%2827%2928%294%2810%286%2916%2825%2926%2912%282%2918%2829%2930/h1-6H/file?format=sdf&get3d=True -- InChI%3DInChI%3D1S/C6H6N12O12/c19-13%2820%297-1-2-8%2814%2821%2922%295%287%296-9%2815%2823%2924%293%2811%281%2917%2827%2928%294%2810%286%2916%2825%2926%2912%282%2918%2829%2930/h1-6H could not be loaded.