general/dihydrofurans

2,3-Dihydrofuran (1) 2,3-Dihydrofuran (1) Vulpinic acid (1) Vulpinic acid (1) 2,3-Dihydrofuran (1) Vulpinic acid (1) 2,3-Dihydrofuran (1) Vulpinic acid (1) 2,3-Dihydrofuran (1) Vulpinic acid (1)