(5R,9R)-8-{[(6S,2R,7R)-6-Hydroxy-2-methyl-4-(3,3,3-trifluoropropyl)(1,4-oxazaperhydroepin-7-yloxy)]methyl}-1-formyl-5-methyl-10-(methylethyl)tetracyclo[7.4.0.0<2,6