spiro,furan,pyrrolizine
Furan
158994-33-33H-Furo[3',4':3,4]oxireno[6,7]cyclohept[1,2-f]isobenzofuran-1,7-dione,3-(3-furanyl)-4b,5a,9,9a-tetrahydro-4-methyl-, (3a,4bb,5ab,9aa)-(-)-
37603-06-88-[(5-methoxy-2,3-dihydro-1-benzofuran-2-yl)methyl]-1-phenyl-1,3,8-triazaspiro[4.5]decan-4-one