prov:value
| - By way of example, compounds of the formulae (IV) and (V) may be mentioned in which R3 is a glycoside (R3???R1), R4 is H, OH or alkoxy; R5 is H, methyl, R6 and R7 are H or combined to a double bond or an epoxy group, R8 in formula (IV) is trans-1-butenyl, 1,3-butadienyl, butyl, 3-hydroxybutenyl, propyl, 1-propenyl, 1,2epoxy-1-butyl, 3-oxo-1-butenyl, CH3CH(OCH3)CH???CH???, CH3CH???CHCH(CH2CO2CH3)??
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