Tropane alkaloid 에 관한 Vitali 반응을 온도변화에 따라 실험한 결과 저온에서는 먼저 p 위치에서 nitro 화한 후 nitro 기의 강한 전자인력(電子引力)에 의하여 쉽게 ester의 가수분해가 진행하면서 산화당하여 p-nitrobenioic acid가 생성되었다. 그러나 고온인 $140^{\circ}$에서는 pyrolytic 에스텔분해가 먼저 일어난 후 nitro 화함으로서 2, 4-diritrobenzoic acid 와 3,5-dinitrobenzoic acid 가 생성되었다.

Silica gel column chromatography on the ether extract from the fruits of Angelica tenuissima $N_{AKAI}$ gave three kinds of crystalline constituents. The following derivatives of furocoumarins and steroid were identified by UV, IR, NMR spectra, elemental analysis and physico-chemical tests: iso-imperatorin m.p. $108{\sim}109^{\circ}\;C_{16}H_{14}O_4$, prangolarine m.p. $103{\sim}104^{\circ}\;C_{16}H_{14}O_5$, ${\beta}-sitosterol$ m.p. $138{\sim}139^{\circ}\;C_{29}H_{50}O$.

This study is about the five species of the genus Thalictrum growing abundantly in South Korea. Dried roots of plants; T. aquilegifolium var. japonica, T. simplex var. affine, T. actaefolium, T. tuberiferum were compared by morphological observation and screening test on the ingredient extracted by methanol, ether etc.. The experiments by thin-layer chromatography was at tempted to find out the similarity and the difference among them. In conclusion, the author found that: 1) A special component similar to coumarin was found under UV-ray from T. actaefolium. 2) By thin-layer chromatography, they show the corresponding spot supposed to be that of berberine and magnoflorine according to the $T_{ABLE}\;IV$. Therefore it is worthwhile considering that Thalictrum species would be a substitution for Epimedium species used as a tonic. 3) Thalictrum species has resemblance of ingredient and chemotaxonomy gives more help to classify them than the morphology.

In order to detect poisonous or physiologically active constituents in the Higher Fungi growing in Korea, forty three species including two varieties were collected in Kyung Ki and Chung Cheong Buk Do Provinces and subjected to systematic extraction with two kinds of organic solvents. The extracts were examined for alkaloid by adding alkaloid reagents. Of these fungi, three species, Geaster fimbriatus, Lampteromyces japonicus and Pseudocolus schellenbergiae, gave positive confirmatory tests.

The flora of Mt. Du Ryun were investigated by the authors from November 3, 1955 to July 21, 1970. 1) Mt. Du Ryun is located at Heanam-Gun, Junla-Nam Do, Korea (between longitude $126^{\circ}\;35'\;E$ and $126^{\circ}40'{\;}E$, and between $34^{\circ}25'$ N.L. and $34^{\circ}30'$ N.L. on the latitude.). Average temperature is $14.1^{\circ}C$, and precipitation per annum 1,488.7mm. 2) On the whole, the observed floral region consisted of 5 formas, 56 varieties, 770 species, 440 genera, 159 families, in 86 orders. 3) The medicinal plants in the area include 321 species, 242 genera and 120 families. 4) The region includes 2 formas, 7 varieties, 30 species in 24 families of evergreen trees. It was pointed out that this area is a typical warm zone in the Korean flora.