Spiro[2H-1-benzopyran-3(4H),4'-[4H]cyclopenta[b]furan]-2,2',4(3'H)-trione,5'-ethenyl-3'a,5',6',6'a-tetrahydro-3',5,5'-trimethyl-, [3'S-(3'a,3'ab,4'a,5'a,6'ab)]-; (+)-Spiroethuliacoumarin; Spiroethuliacoumarin
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