Researchers studying the structures of terpene samples isolated from natural sources often carry out reaction sequences intended to correlate a new structure with a previously identified one, verifying that the stereochemistry matches. One such sequence that researchers carried out is shown below, starting from -eudesmol and resulting in cryptomeridiol stereoisomers. Fill in the missing structures (one structure per box). -eudesmol OH 1. LiAlH4 2. HO workup 1. LiAlH4 2. HO workup HO cryptomeridiol OH OH HO 4-epi-cryptomeridiol