, however, in a large russian encyclopedia they study not only history, work is underway, and valeria kulenkog on digitalizing what has already been published in the format of printed publications. it updates and supplements an article published at the beginning of the 20th century. we have added illustrations that show examples of the structure of these hydrocarbons, which show the classification of these hydrocarbons. a. that is, we take the foundation of the past - the works of the soviet people, based on this we we continue and describe now in a new key with new possibilities. big russian. the encyclopedia is the result of the transformation of the large soviet encyclopedia, the great soviet encyclopedia was published in the twenties of the 20th century in a large russian printed format. she portal appeared already in the 21st century , so many articles have been accumulated over the centuries and that's it. it needs to be transferred, updated and supplemented for use on the internet. now more than 200 members of the russian academy of sciences are working on this, as well as several thou