Growth inhibition of Micrococcus pyogenes var. aureus was tested in 73 kinds of compounds of which the following were able to inhibit growth in 80, 000 dilutions: Isobutyl β-orcinolcarboxylate, butyl 3, 6-dimethyl-5-aldehyde-2, 4-dihydroxybenzoate, ethyl olivetolcarboxylate, isopropyl olivetolcarboxylate, methyl olivetonate, and olivetonide. Propyl olivetolcarboxylate was especially effective, having inhibited growth in 320, 000 dilution. Isobutyl β-orcinolcarboxylate and olivetonide inhibited growth of Bacillus subtilis in 80, 000 dilutions. All these compounds possessed only a weak growth inhibitory action against Escherichia coli communior.
