title: [X-ray structural study of the pyrimido-[5,4-e]-1,2,4-triazine antibiotics xanthothricin and fervenulin].
abstract: The structures of xanthothricin (I) and fervenulin (II), pyrimido-[5,4-e]-1,2,4-triazine antibiotics were determined by x-ray analysis. The crystals of I and II are monoclinic: a 9.667(6), 18.270(7), b 14.029(9), 5.723(2), c 6.914(3), 18.058(7) A, beta 116.47(3), 118.90(2) degrees, Z 4,8; space group P21/c. Analysis of bond length distribution in I and II was indicative of significant alternation of the double and ordinary bonds.
mesh_terms: D055598:Chemical Phenomena; D002621:Chemistry; D011744:Pyrimidinones / Q000032:analysis / Q000633:toxicity*; D014227:Triazines / Q000032:analysis / Q000633:toxicity*; D014961:X-Ray Diffraction
chemical_list: D011744:Pyrimidinones; D014227:Triazines; C007721:fervenulin; C009570:toxoflavin
vernacular_title: Rentgenostrukturnoe issledovanie pirimido-[5,4-e]-1,2,4-triazinovykh antibiotikov ksantotritsina i fervenulina.