A compound of formulas (1A) or (2A) ** (See formula) ** where R3 is a group that has one of the following formulas (3a) to (3v) ** (See formula) ** R4 is H, OH, OR15, or>； = O； R5 is H or CH3； R6 and R7 are H or combine to form a double bond or combine to form an epoxy group； R8 is trans-1- butenyl, 1,3-butadienyl, n-butyl, 3-hydroxy-1-butenyl, n-propyl, 1-propenyl, 1,2-epoxy-1-butyl, 3-oxo-1- butenyl, CH3CH (OCH3) CH>； = CH-, CH3CH (OR15) CH>； = CH-, CH3CH>； = CHCH (CH2CO2Me) -, or CH3CH>； = CH-CH (CH2CON (Me2)) - R9 is H or a group having one of the following formulas (9a) to (9p): ** (See formula) ** R15 is C2-C6 alkyl, branched C3-C6 alkyl, C3-C7 cycloalkyl, C1-C6 alkoxy-C1 alkyl -C6, C1-C6 alkylthio-C1-C6 alkyl, halo-C1-C6 alkyl, C2-C6 alkenyl, C2-C6 alkynyl, formyl, C1-C6 alkylcarbonyl, or branched C3-C6 alkylcarbonyl, C3-C7 alkylcarbonyl, C1-C6 alkoxy-C1-C6 alkylcarbonyl, halo-C1-C6 alkylcarbonyl, C2-C6 alkenylcarbonyl, C2-C6 alkynylcarbonyl； R16 is C1-C6 alkyl, C1-C6 alkenyl, formyl, C1-C6 alkylcarbonyl, or branched C3-C6 alkylcarbonyl； n in the formula (9n) is an integer from 1 to 4； provided that at least one of the following conditions is satisfied: a) R3 is selected from the group consisting of formulas (3g) to (3v)； b) R4 is -OCH3, -OR15 or>； = O； c) R6 and R7 are H or R6 and R7 combine to form an epoxy group； d) R8 is propyl, CH3C (O) CH>； = CH-, CH3CH (OCH3) CH>； = CH or CH3CH (OR15) CH>； = CH-； CH3CH>； = CHCH (CH2CO2Me) -, or CH3CH>； = CHCH (CH2CON (Me2)) - e) R9 is selected from the group consisting of formulas (9j) through (9p)； and provided that in addition the compound formula (1A) where R3 is a group of formula (3a), R4 is H, R5 is H, R6 and R7 combine to form a double bond, R8 is n-butyl, and R9 is H It is excluded.Un compuesto de fórmulas (1A) o (2A) **(Ver fórmula)** donde R3 es un grupo que tiene una de las siguientes fórmulas (3a) a (3v) **(Ver fórmula)** R4 es H, OH, OR15, or >；=O； R5 es H o CH3； R6 y R7 son H o se
