Who is che guevera’s friend who accompanies him in his road  trip by motorcycle as described  in a jorge drexlers song?
Al otro lado del río "Al otro lado del río" (English: On the Other Side of the River ) is a song, written and performed by Uruguayan singer Jorge Drexler for the film "The Motorcycle Diaries" (2004). Besides the film's soundtrack, it can also be found in Drexler's seventh album "Eco"; in the soundtrack the bassist Jeff Eckels also performed.
Santiago Chalar Carlos Alfredo Paravís Salaverry known as Santiago Chalar (September 25, 1938, Montevideo – November 21, 1994) was a physician traumathologist, poet, song-writer, musician, guitarist and singer from Uruguay. He studied music and medicine. He used an alias Santiago to pay homage to a friend of his who died in a plane accident and Chalar was one of his ancestors last name. In his artistic career he achieved recognition and fame. He obtained some music awards. He is considered one of the best Uruguayan folk music song-writers and singers.