source: [lemma=testosterone] [lemma=to] [□] □
destination: [lemma=testosterone] [lemma=to] [□=□] □
spec: Proscar works by inhibiting 5-alpha-reductase , an enzyme that converts testosterone to androgen dihydrotestosterone , which is believed to influence the development of prostate cancer . Faculty advisor , Gary R. Hepp , 844-9254 .