Dh44-R2 Dh44 receptor 2 anon-WO0170980.103 anon-WO0170980.104 DH-R Diuretic hormone 44 receptor 2 CRF-like diuretic hormonereceptor 2 Dh442 CG12370 DH44R2 DH[[44]]-R2 CG13156 Dh44R2 DH44-R2 gene