73618-74-3

Obtusin【Laurencia】 (2R,3S,3'aR,5S,5'R,6'aR)-3-Bromo-5-[(R)-1-bromopropyl]-5'-[(R)-1-bromo-2-propynyl]hexahydrospiro[furan-2(3H),2'(3'H)-furo[3,2-b]furan] (2R,3'aR,6'aR,3S,5S)-3-Bromo-5-[(R)-1-bromopropyl]-5'β-[(R)-1-bromo-2-propynyl]-4,5,3'a,5',6',6'a-hexahydrospiro[furan-2(3H),2'(3'H)-furo[3,2-b]furan]