Looking google maps have located 4 points and have created a polygon with them in this way

insert into dummy_zip values (4,'prueba_directa','2016-04-13 08:08:15.973731','prueba_directa',1,1,100,'2016-04-13 08:08:15.973731',(SELECT ST_Transform(ST_GeomFromText('MULTIPOLYGON(((37.986504 -1.121951,37.986741 -1.121243,37.985794 -1.120792,37.985608 -1.121479,37.986504 -1.121951)))',4326),900913)));

but when displayed on the map in a completely different location that should be, because it can be?