2-(四氢-2H-吡喃-2-氧基)乙醇

methyl 4-(oxan-2-yloxy)but-2-ynoate

2-(oct-2'-ynyloxy)tetrahydro-2H-pyran

3,4-二氢-2-甲基-吡喃

3,4-二氢-2H-吡喃