3-(3-butenyl)-5-phenyl-1,3,4-oxadiazol-2(3H)-one
3-(3-butenyl)-5-phenyl-1,3,4-oxadiazol-2(3H)-one ??
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3-(3-butenyl)-5-phenyl-1,3,4-oxadiazol-2(3H)-one ?? ?? ? ???
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3-(3-butenyl)-5-phenyl-1,3,4-oxadiazol-2(3H)-one ?? ??
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