2,4-Dichloro-N-(2,4-dimethylphenyl)benzenesulfonamide

24

0

Age303s-24-74764-8 24..32

3β-Chloro-N-methoxy-N-methyl­cholest-5-ene-24-carboxamide

The title compound, C26H42ClNO2, is a 3β-chloro steroid with a Weinreb amide at the C-24 position. The two cyclo-hexane and the cyclo-hexene rings adopt chair and boat conformations, respectively. The cyclo-pentane ring has an envelope conformation.

24 . Cosmic rays 1 24 . COSMIC RAYS

The cosmic radiation incident at the top of the terrestrial atmosphere includes all stable charged particles and nuclei with lifetimes of order 106 years or longer. Technically, “primary” cosmic rays are those particles accelerated at astrophysical sources and “secondaries” are those particles produced in interaction of the primaries with interstellar gas. Thus electrons, protons and helium, as...

معمار 24

-