WURCS=2.0/3,6,5/[hxh][a2122h-1x_1-5][a2112h-1x_1-5]/1-2-2-1-1-3/a?-b1_b?-c1_d?-f1_c?-d?*OPO*/3O/3=O_d?-e?*OPO*/3O/3=O