The chemical compound "(20Ξ)-9-fluoro-2'-(4-fluoro-phenyl)-17,20;20,21-bis-methanediyldioxy-16α-methyl-2'H-pregn-4-eno[3,2-c]pyrazol-11-one" is a complex steroidal molecule with a pyrazolone ring. It features a 9-fluoro substitution, a 4-fluoro-phenyl group at the 2' position, and a 16α-methyl group. The molecule also contains two methylene dioxy bridges (methanediyldioxy) at positions 17,20;20,21, which are characteristic of many natural products and synthetic compounds derived from plants. This structure is part of the pregnane family, indicating it has a steroidal skeleton with a pyrazolone ring fused to it, and the 11-oxo group suggests the presence of a ketone at the 11th carbon. (20Ξ)-9-fluoro-2'-(4-fluoro-phenyl)-17,20;20,21-bis-methanediyldioxy-16α-methyl-2'H-pregn-4-eno[3,2-c]pyrazol-11-one is likely to have significant biological activity due to its structural complexity and the presence of multiple functional groups, which can interact with various biological targets.
The CAS Registry Mumber 1961-56-4 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 1,9,6 and 1 respectively; the second part has 2 digits, 5 and 6 respectively. Calculate Digit Verification of CAS Registry Number 1961-56: (6*1)+(5*9)+(4*6)+(3*1)+(2*5)+(1*6)=94 94 % 10 = 4 So 1961-56-4 is a valid CAS Registry Number.