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.
Jorge Calderón Jorge Calderón, originally from San Juan, Puerto Rico, is a multi-instrumentalist, songwriter and record producer best known for his collaborations with Warren Zevon and Buckingham Nicks. He began working with Buckingham Nicks in 1972 as a percussionist. He toured with the band until they disbanded in 1975. He later worked with Fleetwood Mac, recording and writing a song, "Kiss and Run". The song was released on the 2004 remastered version of "Tusk". He holds the unique distinction of having been credited on all of Warren Zevon's post-1976 albums with the exception of "My Ride's Here". Additionally, he produced Zevon's final album "The Wind", on which he also co-wrote many of the tracks, as well as the Zevon tribute album "". On "The Wind", he plays bass, acoustic guitar, various percussion, electric guitar, as well as providing background vocals.