Sentence: The objective of this study was to compare cycle control , efficacy and tolerance of an oral contraceptive containing 20 microg ethinylestradiol and 150 microg desogestrel with a preparation containing 30 microg ethinylestradiol combined with 75 microg gestodene .
Drug combination annotation:
[{'class': 'POS', 'spans': ['ethinylestradiol', 'desogestrel'], 'is_context_needed': True}, {'class': 'POS', 'spans': [2, 3], 'is_context_needed': True}]