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Degrees of unsaturations

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Hello, everyone I have a question that i'm having a difficult time answering. Any help would be appreciated. The question is as follows:

 

Given that compound A (C30H49B2Br5N7O2S) is hydrogenated to give compound B (C30H55B2Br5N7O2S), how many rings does compound A have. Assume the valency of sulfur in this compound is 4.

 

a) 5

 

b) 6

 

c) 7

 

d) 8

 

e) none of the above

Edited by Jemalsbros

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