11.How many stereogenic (chiral)centers are found in Rhizoxin? Rhizoxin HO.0:] 义人 H A)5B)7C)9D)11E)14 Ans:D Ans:E 13.The following two molecules may be described as: 8mdonos 14.The following molecule has how many possible stereoisomers? B)4C)8 16 E)32 Page5 Page 5 11. How many stereogenic (chiral) centers are found in Rhizoxin? O O O O O CH3 H H O H H CH3 H HO H H CH3 H OCH3 H N O Rhizoxin A) 5 B) 7 C) 9 D) 11 E) 14 Ans: D 12. The meso isomer of 3,4-dibromohexane has what stereochemical configuration? A) 3R, 4S B) 3R, 4R C) 3S, 4S D) 3S, 4R E) both A and D Ans: E 13. The following two molecules may be described as: A) constitutional isomers D) structural isomers B) diastereomers E) none of the above C) enantiomers Ans: B 14. The following molecule has how many possible stereoisomers? O A) 1 B) 4 C) 8 D) 16 E) 32 Ans: E