Sentence: Then , neoadjuvant chemotherapy ( NAC ) consisting of a combination of 5-fluorouracil ( 5-FU ) , oxaliplatin , irinotecan , and leucovorin ( FOLFOXIRI ) was planned , followed by primary tumor resection .
Drug combination annotation:
[{'class': 'POS', 'spans': ['5-fluorouracil', 'oxaliplatin', 'irinotecan', 'leucovorin'], 'is_context_needed': True}]