obsolete 1-18:2-2-18:2-sn-glycerol-3-phosphocholine desaturase activity (SN2-18:3 forming) (obsolete GO:0102862)
OBSOLETE. Catalysis of the reaction: 1-18:2-2-18:2-sn-glycerol-3-phosphocholine + O2 + a reduced electron acceptor = 1-18:2-2-18:3-phosphatidylcholine + 2 H2O + an oxidized electron acceptor.