Alkaloid use of Ephedra and opium poppies. Also, coca leaves have been used by South American Indians since ancient times. Extracts from plants containing toxic alkaloids, such as aconitine and tubocurarine, were used since antiquity for poisoning arrows. Studies of alkaloids began in the 19th century. In 1804, the German chemist Friedrich Sertürner isolated from opium a "soporific principle" (), which he called "morphium" in honor of Morpheus, the Greek god of dreams; in German and some other Central-European languages, this is still the name of the drug. The term "morphine", used in English and French, was given by the French
Ivan (name) It is the Slavic relative of the Latin name "Johannes", corresponding to English "John". This Slavic version of the name originates from New Testament Greek "" ("Iōánnēs") rather than from the Latin "Io(h)annes". The Greek name is in turn derived from Hebrew יוֹחָנָן ("Yôḥānān"), meaning "YHWH (God) is gracious". The name is ultimately derived from the Biblical Hebrew name יוחנן (), short for יהוחנן (), meaning "God is merciful". Common patronymics derived from the name are Ivanović (Serbo-Croatian), Ivanov (Russian and Bulgarian), and Ivanovich (Russian, used as middle name), corresponding to "Ivan's son". The name is common among Russians, Ukrainians,