They were selected on
the basis of an allelopathy-based literature survey.4,5,13 In
addition, we selected one acid pyrone (coumalic acid (8)) and
two hemisynthetic derivatives of 2-benzoxazolinone, one with a
benzyloxy ring (2) and another with a cloroacetyl substituent at
the C-6 position (3) (Figure 1). All chemicals tested were
obtained from Sigma-Aldrich (St. Louis, MO), except for
benzoic acid, which was obtained from Merck (Merck,
Germany).
They were selected onthe basis of an allelopathy-based literature survey.4,5,13 Inaddition, we selected one acid pyrone (coumalic acid (8)) andtwo hemisynthetic derivatives of 2-benzoxazolinone, one with abenzyloxy ring (2) and another with a cloroacetyl substituent atthe C-6 position (3) (Figure 1). All chemicals tested wereobtained from Sigma-Aldrich (St. Louis, MO), except forbenzoic acid, which was obtained from Merck (Merck,Germany).
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