Degrees of unsaturations

[Jemalsbros]

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 February 17, 2017 by Jemalsbros

[BabcockHall]

What are you thoughts? We cannot help you until you show us what yo have done so far.