Lufthansa was still operating 747 Combi service into Bogota as late as the fall of 1993. At this time, their service into Quito (and I believe you meant UIO and not UIQ) as well as Lima, La Paz and Guayaquil was being operated in conjunction with local air carriers with passengers transferring to or from an LH aircraft at Bogota. Here are the eastbound scheds....

LH 537: La Paz (LPB) 13:50 - 14:40 Lima (LIM) 15:20 - 18:20 Bogota (BOG) 19:45 - 22:30 Caracas (CCS) 23:50 - 14:05 (+1) Frankfurt (FRA)
Freq: Thursdays only
Equip: LH 537 EQUIPMENT 727-BOG-74M
Note: LH 537 OPERATED BY LB LPB-BOG

LH 537: Guayaquil (GYE) 15:20 - 15:50 Quito (UIO) 16:50 - 18:15 Bogota (BOG) 19:45 - 22:30 Caracas (CCS) 23:50 - 14:05 (+1) Frankfurt (FRA)
Freq: Thursdays and Saturdays only
Equip: LH 537 EQUIPMENT 727-BOG-74M
Note: LH 537 OPERATED BY EQ GYE-BOG

The 727 service LPB-LIM-BOG and GYE-UIO-BOG was respectively operated by Lloyd Aereo Boliviano (LB) and TAME (EQ).

In addition to the 747 Combi flights, LH was operating standard passenger 747 service from Bogota to Frankfurt via Caracas once a week every Monday. The aforementioned 727 services operated by LB and EQ fed this flight as well on Mondays.

BTW, Lufthansa was continuing to operate significant 747 Combi service from Frankfurt in the fall of 1993. Cities receiving LH 74M service to and from FRA included Bangkok, Beijing, Bombay (now Mumbai), Cape Town, Chicago, Dallas/Fort Worth, Delhi, Harare, Ho Chi Minh City, Hong Kong, Houston, Jakarta, Johannesburg, Karachi, Kuala Lumpur, Los Angeles, Manila, Mexico City, Rio de Janeiro, San Francisco, Santiago, Sao Paulo, Seoul, Singapore, Taipei, Tel Aviv, Tokyo, Toronto and Windhoek. The vast majority of these flights were not operated daily and not all were operated on a nonstop basis as well.