Problem: A biosynthetic pathway was recently proposed for the polycyclic, cytotoxic compound aspernomine, isolated from the fungus Aspergillus nomius (J. Am. Chem. Soc. 2012, 134, 8078–8081):(a) Two of the six-membered rings are represented in chair conformations. Is the connection between these two rings analogous to that in cis- or trans-decalin?

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A biosynthetic pathway was recently proposed for the polycyclic, cytotoxic compound aspernomine, isolated from the fungus Aspergillus nomius (J. Am. Chem. Soc. 2012, 134, 8078–8081):

(a) Two of the six-membered rings are represented in chair conformations. Is the connection between these two rings analogous to that in cis- or trans-decalin?

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