γ-benzyloxymethyl-α,β-butenolide

(+)-(2S,3S,4S)-2-piperonyl-3-(2-(3,4,5-trimethoxyphenyl)-1,3-dithiane-2-yl)-4-benzyloxymethyl-butan-4-olide

(4S)-(+)-2-phenylseleno-4-benzyloxymethyl-butan-4-olide

(3S,4S,5S)-3-Benzo[1,3]dioxol-5-ylmethyl-4-(3,4,5-trimethoxy-benzyl)-5-trityloxymethyl-dihydro-furan-2-one

(4S,5S)-4-(3,4,5-trimethoxybenzyl)-5-((trityloxy)methyl)dihydrofuran-2(3H)-one