Crystal structure and charge distribution for 20 oximino-5?-pregn-16-eno[3, 4,-c]-1?2?5?-oxadiazole (HS998)

Abstract

The crystal structure of the modified steroid, 20 oximino-5a pregn-eno [3, 4-c] 1'2'5' oxadiazole (HS998) using X-ray diffraction is reported. HS998 crystallizes in the orthorhombic space group P212121, having cell parameters a = 13.465(3), b = 18.792(4), c = 7.598(2)A; Z = 4. The structure was solved by direct methods and refined by full matrix least squares to R = 0.060 for 3478 reflections.