Culturas do fungo Fusarium graminearum sob agitação na presença do diterpeno ácido cupréssico [ácido 13-hidróxi-(17),14-labdadien-19-óico], obtido de Araucarea angustifolia elegans, produziram quatro derivados diterpênicos hidroxilados os quais foram identificados por métodos químicos e físicos como sendo os ácidos 3beta,13-diidróxi-8(17),14-labdadien-19-óico, 7alfa,13-diidróxi-8(17),14-labdadien-19-óico, 8,13,17-triidróxi-14-labdaden-19-óico e 13,14,17-triidróxi-14-labdaden-19-óico.
Cupressic acid [13-hydroxy-8(17),14-labdadien-19-oic acid], a diterpene obtained from Araucarea angustifolia elegans was biotransformed by Fusarium graminearum producing four hydroxylated diterpene derivatives, which were identified by chemical and physical methods as 3beta,13-dihydroxy-8(17),14-labdadien-19-oic acid, 7alpha,13-drihydroxy-8(17),14-labdadien-19-oic acid, 8,13,17-trihydroxy-14-labden-19-oic acid and 13,14,15-trihydroxy-8(17)-labden-19-oic acid.