Penicillium purpurogenumに属する1菌株の生産する白色結晶-glauconic acid-及び色素について

抄録

From morphological and biological aspects, the strain, -used in this experiments, belongss to Penicillium purpurogenum. This strain grew well in the glucose-CZAPEK's medium in surface and submerged cultures, and produced white crystals accompanied with red pigments. This white crystals were precipitated from culture filtrate by acidifying with mineral acid.
The crude precipitate was extracted with acetone and from this solution white crystals of needle-like prism were obtained. The melting point of the crystal recrystallized from chloroform and aqueous acetic acid was 200.5_??_201.5° (obsd.). From the data of elementary analysis and molecular weight measurement the molecular formula must be C₁₈H₂₀O₇.
The physical and chemical characters of the white crystal and the melting point of its acetylated compound showed the same experimental results as those characters of glauconic acid. When this white crystal was mixed with glauconic acid there was no change in melting point, and the infra-red absorption spectrums showed complete identity. From these experimental results we concluded that this white crystal is identical with glauconic acid of WIJKMANN et al., originally found in cultures of a Penicillium glaucum.
The authors wish to express their sincere thanks to Dr. K. SAKAGUCHI for his guidance and Dr. Herrman SUTTER for his kind offer of the sample of glauconic acid for identification.