How many chiral centers are in the structure of Buprenorphine?

by WithDrawMe

Structure can be seen here http://en.wikipedia.org/wiki/Buprenorphine
I think it has 7, but I’m not 100% sure. Thanks!

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Tagged as: Buprenorphine, Chiral Centers, Wiki, Wikipedia

water_skipper

Judging by the name I'd guess five, but I've never worked with a molecule that complicated.