what was the name of the drug that was prescribed to patient 4301 for the first time until 07/2103 via tp route?
select prescriptions.drug from prescriptions where prescriptions.hadm_id in ( select admissions.hadm_id from admissions where admissions.subject_id = 4301 ) and prescriptions.route = 'tp' and strftime('%y-%m',prescriptions.startdate) <= '2103-07' order by prescriptions.startdate asc limit 1