3,4-bis(phenylmethoxy)-2-(phenylmethoxymethyl)-3,4-dihydro-2H-pyran;2-ethyl-3,4-dihydro-2H-pyran-3,4-diol;2-[[3-hydroxy-2-[tri(propan-2-yl)silyloxymethyl]-3,4-dihydro-2H-pyran-4-yl]oxy]-4,5-bis(phenylmethoxy)-6-(phenylmethoxymethyl)oxan-3-ol;[3-phenylmethoxy-4-[3,4,5-tris(phenylmethoxy)-6-(phenylmethoxymethyl)oxan-2-yl]oxy-3,4-dihydro-2H-pyran-2-yl]methoxy-tri(propan-2-yl)silane