benzyl 2(R)-<5(R)-ethyl-3(R)-methyl-5-<3(R)-1,5-dioxa-4(R)-methylspiro<2.5>-6(S)-octyl>-2(R)-tetrahydrofuryl>butyl ether

benzyl 2(R)-<5(R)-ethyl-3(R)-methyl-5-<5(R)-(methoxymethoxy)-6(R)-methyl-2(S)-tetrahydropyranyl>-2(R)-tetrahydrofuryl>butyl ether