The elements in group 17 of the periodic table, including fluorine, chlorine, bromine, iodine, and astatine
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(3R,8S,9S,10R,13R,14S,17R)-3-iodo-10,13-dimethyl-17-((R)-6-methylheptan-2-yl)-2,3,4,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthrene
2-methyl-2-nitroso-1-phenyl-1-propanone
