4,5 dimethyl 3 hydroxy 2,5 dihydrofuran 2 one

4,5-Dimethyl-3-hydroxy-2,5-dihydrofuran-2-one (Fenugreck Lactone) 是一种食品香料，主要用于焦糖、红糖、威士忌、棉花糖、咖啡、太妃糖等香精。

4-[(1R,3aS,3bR,7S,9aS,11aR)-7-{[(2R,3R,4R,5R,6S)-4,5-dihydroxy-6-methyl-3-{[(2S,3R,4S,5S,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxy}oxan-2-yl]oxy}-3a-hydroxy-9a,11a-dimethyl-hexadecahydro-1H-cyclopenta[a]phenanthren-1-yl]-2,5-dihydrofuran-2-one是一种高纯度生化试剂，可用于生物化学实验和药物合成研究。

6-{6-[(4E)-hex-4-enoyl]-5-(3-hydroxy-2,4-dimethyl-5-oxo-2,5-dihydrofuran-2-yl)-3-methylcyclohex-2-en-1-yl}-4,5-dihydroxy-3-methoxy-4-(4-methoxyphenyl)-1,2,3,4-tetrahydroquinolin-2-one是一种高纯度生化试剂，可用于生物化学实验和药物合成研究。

6-{6-[(2E,4E)-hexa-2,4-dienoyl]-5-(3-hydroxy-2,4-dimethyl-5-oxo-2,5-dihydrofuran-2-yl)-3-methylcyclohex-2-en-1-yl}-4,5-dihydroxy-3-methoxy-4-(4-methoxyphenyl)-1,2,3,4-tetrahydroquinolin-2-one是一种高纯度生化试剂，可用于生物化学实验和药物合成研究。

4-[(1S,3aS,3bR,7S,9aR,9bS,11aR)-7-{[(2R,3R,4S,5S,6R)-4,5-dihydroxy-6-(hydroxymethyl)-3-{[(2S,3R,4S,5S,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxy}oxan-2-yl]oxy}-3a-hydroxy-9a,11a-dimethyl-1H,2H,3H,3aH,3bH,4H,6H,7H,8H,9H,9aH,9bH,10H,11H,11aH-cyclopenta[a]phenanthren-1-yl]-2,5-dihydrofuran-2-one是一种高纯度生化试剂，可用于生物化学实验和药物合成研究。