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

benzyl 2(R)-<5(R)-ethyl-3(S)-methyl-5-(5(S)-(methoxymethylenoxy)-6(S)-methyl-2(R)-tetrahydropyranyl)-2(S)-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