Complex sentence: Jiraiya shares his knowledge with the rest of the group from Hanzaki; when he compared Sasame's comments and behavior with what the rest of the Fuma Clan had told him, he realized that Sasame was connected with Orochimaru.
Split into simpler sentences: Jiraiya shares his knowledge with the rest of the group from Hanzaki. After comparing Sasame's comments and behavior with what the rest of the Fuma Clan had told him, he realizes that Sasame is connected with Orochimaru.