De novo sequencing of two novel peptides homologous to calcitonin-like peptides, from skin secretion of the Chinese Frog, Odorrana schmackeri

•CID & ETD de novo sequencing was completed on 2 novel 34 residue frog skin peptides.•Both intramolecular S–S bridged peptides share sequence homology with calcitonin.•Odorrana schmackeri calcitonin-like peptide (OsCTLP)-1 and OsCTLP-2.•OsCTLP-1: GCD[I/L]STCATHN[I/L]VNE[I/L]NKFDKSKPSSGGVGPESP-NH2.•OsCTLP-2: SCNLSTCATHNLVNELNKFDKSKPSSGGVGPESF-NH2.