C[C@H]1CC[C@H]2[C@@H]3CC(=O)[C@H](Cn4cnc5[nH]c(=O)[nH]c5c4=O)[C@@]13CC2(C)C	1-[[(1S,2S,5S,6S,9S)-9,11,11-trimethyl-3-oxo-2-tricyclo[4.3.2.01,5]undecanyl]methyl]-7,9-dihydropurine-6,8-dione