(5R-(5alpha,5aalpha,8aalpha))-5,8,8a,9-Tetrahydro-5-(7-methoxy-1,3-benzodioxol-5-yl)furo(3',4:6,7)naphtho(2,3-d)-1,3-dioxol-6(5aH)-one 55890-20-5 Austrobailignan 2 Furo(3',4':6,7)naphtho(2,3-d)-1,3-dioxol-6(5aH)-one, 5,8,8a,9-tetrahydro-5-(7-methoxy-1,3-benzodioxol-5-yl)-, (5R-(5alpha,5aalpha,8aalpha))-