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Table 1.

Average periods and phase 0 dates for molecular species showing variability.

Species τ0 (MJD) Π (days) Species τ0 (MJD) Π (days)
HC3N 7667.1 638.4 HC5N 7660.8 637.2
HC3N v7 7644.7 628.2 C5H 7662.8 639.5
C2H 7328.0 664.4 H2C4 7672.0 664.6
C4H 7339.6 642.6 C4H v7 7671.0 639.1
CN 7669.0 655.3 13CN 7662.4 622.8

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